Hmmm, reading this question makes me realize that I don’t believe I’ve ever even seen one in real life, I’ve only seen pictures of them or I’ve seen them in movies. That means I’ve never been close to one either.
I hitched a ride to a motorcycle race with some fellow racers back in 1995. One racer used a bong full of marijuana before he went out to race. This is how he got himself 'pumped up' for the race. He was doing alright until he somehow got his racing bike stuck up a tree. I helped him get it down.