Marty's escape choice makes no sense

If you pause to look at where Marty is in relation to Biff's car, just before he looks into the tunnel, it's not that far away, and there's plenty of room on both sides. Cars have notoriously wide turn radius, so Marty could probably easily escape Biff by going TOWARDS Biff's car, not AWAY from it.

This would also shorten the acceleration time Biff would need with that car to get it to any kind of 'lethal speed', and as shown, Marty can very easily just jump with that Hoverboard, basically perform a cartwheel and land safely - as we are shown him do when he acrobatically steals the Almanac back from Biff's car.

So instead of just uselessly trying to paddle through the tunnel (with the usual 'movie cheating' mechanism that's the only reason Marty even survives that - in real life, there's NO chance for Marty to reach the end of the tunnel before Biff's car reaches Marty's buttocks)..

.. WHAT IF Marty did the more intelligent thing and paddled TOWARDS Biff?

First of all, this would confuse and baffle Biff, ruin his plan, force him to reset and realign his thought process - now he can't just push pedal to the medal and easily murder Marty, because by the time he gains any kind of speed, Marty is already at his car, doing the cartwheel-thing and landing to safety. Biff can't turn the car fast enough to get to Marty before he's able to hover himself somewhere far away in the bushes/forest/whatever (terrain is no problem for someone that has a hoverboard).

Second of all, even if he doesn't do a cartwheel, he could 'feint' by seemingly going to the right (so Biff aims his car that way), then making a sudden turn to the left and bouncing off the tunnel wall (so even if Biff doesn't fall for the feint, he still can't reach him) and effectively jump over Biff's car and easily gain the distance he needs.

Cars can't turn very fast, so once Biff's car is going towards Marty's right (Biff's left), then Marty's left (Biff's right) will be an open, gaping hole that Biff can't close with the clunky car anymore. Once he's committed to a side, the other side will be open, and a pedestrian (especially with a Hoverboard) can easily outmaneuver a clumsy 1950s car.

Anyone that has seen the 'Real Hustle' video, where a human beats horse in a race, knows how big things, even with high top speed, will lose to smaller things, even with low top speed, if they have to constantly maneuver a lot. The horse lost, because it could never get up to speed, because it had to swerve back and forth, and its turning radius is much bigger, so the more nimble human won easily.

This is basically the same situation - you have the 'tight' turning radius of a pedestrian with Hoverboard (with super jumping capability with aerial, parkour-style wall-bouncing cartwheels as shown) versus a 'loose' turning radius of a big, clunky 1950s automobile. The human would win so easily and in so many ways, it BOGGLES the mind why Marty would ever make the decision to run the other way and give Biff the chance to accelerate to a lethal speed!

Watch the 'first movie' to see how it could've been done, and what Marty not only SHOULD'VE done, but also what Marty's nature compelled him TO ALREADY DO previously! He actually ran TOWARDS Biff in the first movie, running ON HIS CAR and jumped OFF the back of the car to land on the makeshift skateboard.

WHY, oh, why, can't this rip-off of a movie (it rips off so much from the first movie, why not go all the way?) do this? I mean, it basically has no plot besides 'chase the MacGuffin', and whatever 'good' or 'genious' things people praise, are lifted off of the first movie, so why not also do this and have Marty bravely face the 'danger' he has beaten before so many times, and just do a similar jump?

It's the same kind of stupidity and OBVIOUS choice ignored as Indy runnign AWAY from the big rock (he could easily run towards and avoid any danger), the moron in Robocop not running towards ED-209 but just uselessly run around the meeting room so he's shot by the robot, and so on.

Why can't Marty just run TOWARDS Biff and thus make it impossible for Biff to murder him with his car? Even if he gets it moving to some kind of speed and actually hits him, Marty is going to be prepared (seeing the car all the time), still having the acrobatic jumping possibilities AND the first movie's possibility of jumping up and running on his car (a bit different with the Hoverboard, but could still be done - he could 'hover' over the car at least)?

It makes absolutely NO sense for Marty to go away from Biff, when he should go towards, but then, what does make sense in any of these movies?

Doc should just decide to NOT steal any plutonium, or Marty could go back in time just after Doc stores the plutonium under the bed, take it and dump it somewhere where Doc will never find it, that would solve ALL the problems instantly (though by creating a paradox, but what wouldn't..?)