why is my car braking at end of drag strip???

running the drag strip, car brakes by itself with 200 ish yards left and 2 or 3 guys fly by me with like a second left, needless to say this is FRUSTRATING AS HELL. does anybody know why? [Mod Edit - Abbreviated profanity, profanity and profanity that is disguised but still alludes to the words are not permitted - D] tune? glitch? idk. happened to me in both dodge dart and mercury coupe. no idea why. i can understand if i was running out of gear and was no longer accelerating but this is not the case. car brakes by itself. no idea why. HELP.