About the ending...*spoilers*
Someone posted in a different topic about an ending in which Bronson fakes his death and then watches as the car explodes...
I had always thought (or hoped) that actually the Bronson character knew about Steve (Jan-Michael Vincent) trying to poison him and only faked his death to be able to retire for good (remember his bosses wanted him dead).
It's pretty logic if you think of it... We know he knew because he planted the bomb in the car and the only way to start over (or stay in business) was to fake his death...
It is also very unlikely that his character would be fooled into drinking poison...unless he wanted to. I don't quite remember but I believe he only took a sip at the cup, which means that he faked drinking the poison. If I recalled wrong, then the chance he took an antidote previously seems fairly possible.
What do you think?