Fengzi - I'm thinking you're right. I don't think flavored papers would do that? Either way - it worked.
I just can't figure out the cigar smell part though.

Graph - No, no one was smoking a cigar! I was interested because it was remarkablely stealthy. They didn't just take a few hits, they were smoking the whole show and I barely smelled it standing next to them. Most times, I smell it when I'm 15-20 people away. Instantly. They obviously had this figured out and it intrigued me.