(Subconsciously!) I avoid stepping on cracks in sidewalks for fear of breaking my mother's back... Old habits die hard, I guess.
Best car chase in a movie?
(I'd probably have to go with the old standby, the chase between Steve McQueen's green '68 Ford Mustang GT 390 and Bill Hickman's ominously black '68 Dodge Charger R/T 440 Magnum in Bullitt. Honorable mention to all of the chases in Ronin.)