No but if you don't chew it enough at first and then it dissolves its probably one of the worst tastes possible to swallow at that point. I was stoned in highschool once and let some gum do that and started gagging in class.
hmmm...you seem to have failed in catching the sarcastic-ism (if that's a word) of the post. see, I don't REALLY eat garbage truck tires. I was being sarcastic. Maybe I should've put "*sarcastic*" in front of it. And I ran away so no one would--uh....I don't know how to explain it.