Wasn’t this a Darwin Award entry several years back. The story IIRC was a guy in California tried this and tied a rope to the truck so the lounge chair would only go up 50 or so feet. He had a BB gun and was going to shoot balloons to lower up himself.
Story goes, the rope got loose and the guy floated above LAX.
Here is the best summation I have found. I lived in nearby Huntington Beach, at the time, it was a big story. I remember many details of the story, this account squares with my recollection:
http://www.markbarry.com/lawnchairman.html