You don't have to worry 'bout my age, bro. But what I
can tell you is that in college, hookah is anything but childish

It's a fun thing to do every now and then, especially if you're stressing over Finals and shit.
But let's say something like this happens:
Me: "Normally, I'd want to smoke shisha with my other best friend, but she doesn't smoke. I always wanted to try this trick, but I never got the chance to do it."
HB: "Try what, exactly?"
Me: [Already inhales smoke. Confidently leans in towards her.]
HB:
"What are you doing???"
Me: [Exhales smoke.]
"Nothing."
Plans don't always follow every step of the way, so how would I recover from this misstep?