Read it... he said he wants to set a descent rate record.

About the only way he'll do that with a balloon... ignite the envelope so it doesn't exist to creat drag.

A lot of attempts at that record were made in WWI... the occupant of the observation blimp would normally attempt to jump clear (first military use of the parachute)

It'll be hard for him to beat the WWI blimp record for descent rate... He's usng helium. The WWI blimps burned really quick... Hydrogen filled.