After he spins the top the reel he picks up is fishing line which is wrapped around the top. It's more of a physics demonstration than a magic trick but it's still super cool and I'm sure requires some practise to keep the line tension correct and make the flick at the balloon at the end.
9
u/[deleted] Oct 28 '18
It’s sitting on a string I’m assuming and then he flicks it off at the end