IMPOSSIBLE QUESTION:
55% of all people say they would never admit to doing this unless they were caught in the act;  what is it? 

It is illegal 
It involves your car...and maybe another 

ANSWER:
55% of people would never admit to hitting a parked car unless they were caught while doing it! 
   
Congratulations to Sean Shelton of Richmond for being the first to correctly answer the Impossible Question!