How to Calculate How Many Helium Balloons David Blaine Needed

I'm not saying you should float yourself up into the air, but if you wanted to, you need to take pressure, density, and a few other things into account.

How to Calculate How Many Helium Balloons David Blaine Needed
I'm not saying you should float yourself up into the air, but if you wanted to, you need to take pressure, density, and a few other things into account.