The end--a slight rip off of 'the mechanic'.
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The ending, where glover "drives off' with the car--thinking he has "won' is a bit of rip-off of, or homage to-- the Bronsan film "the mechanic". Instead of merely having the car blow as soon as Glover gets in--he lets him drive it--and enjoy it..for a few seconds..then, the doors lock, and that tape comes on, and then....BOOM!!
I reckon it was a sort of "update" to the scene in Mechanic, maybe.