Did anyone seriously think he was gonna pull this off?
Mac
Well, yes, he had actually tried this once before, last January 13th. He only used 600 balloons then, and only stayed aloft for a little over 4 hours, no where near the record. So he added more balloons this time. It is said that he used just over 1,000 balloons in this attempt.
In his previous attempt, he went to 17,390 feet. So this time, who knows how high he may have soared? It is doubtful that he did any calculations to figure this out in advance. He simply added 400 more balloons.
Doesn't it get difficult to breath at those higher altitudes? I have never been higher than 8,400 ft myself, so I don't have any experience with that. He did wear a thermal suit to help keep him warm.
This will no doubt remain a mystery, since any physical evidence now rests in the Atlantic Ocean.
.