May be simple, but it's all in the presentation. Brilliant presentation!

Fantastic,  cant get much better than that!
true  showmanship ! :D

I know him now :)

simple trick but very very brilliant presentation! My compliments from Italy XD

and that's a banana "ohhh!" :) xD

@ElvisPresley42

explain it please :)

how did he do this trick?

Do you need a thump tip to do the routine?

Holy crap Wayne is the funniest dude ever

Simple sleight of hand when he put it into the envelope. A small slit at the base of the flap would allow the note to look like it went inside, but actually slipped outside the envelope and was held against the back with his thumb. He pockets it after applying saliva to the flap.
(Dunno how he got it into the banana though. A hole in the base?)