I dunno.... IMO they're not vape tricks, they're the same smoke tricks that have been around forever, some a little more intense because you can get a lot more vapor going with juice than you could with any cigarette or cigar. You know.... the kind of tricks your kind of weird, single and usually drunk uncle would do at picnics and what not to entertain kids. Still think my uncle like this got royalties for all the cigs I purchased later in life because he made it look so cool - but that's a different story!
You just need really thick vapor - or smoke of course. I don't vape that thick either, so isn't going to happen. I guess the "safest" way to do it would be to get a modded e-cig (or seriously modded like the kid above) and some 0 nicotine juice. You could blow huge clouds of vapor and do whatever tricks you can manage. With an herbal vaporizor and any decent buds, think you'll be combusting or damned close before you get vapor anywhere near thick enough to see that well. And, make sure you don't inhale!
Might be better off looking for tips in an e-cig forum than FC.
Oh.... and
@sasNW ....LMAO. That dude has WAYYYYYY too much time on his hands!