I think it's highly unlikely, especially if they were holding the crack vapors in for a few counts like any good basehead would, most of it would be absorbed in their lungs. Unless they were blowing it out into your face and you were trying to suck it in, I just don't see it happening. A placebo effect is very possible, and that's not a bad thing, you didn't have to pay to feel high lol.
Oh and however said crack doesn't chill you out is wrong. I've smoked my fair share of rock before and it effects everyone differently, but for me I either feel real psyched and pumped up like I can conquer the world or I just want to lie down between hits and bask in the short lived glory.