I found it odd that "Henry" could just rattle off dimensions of a hot air balloon so quickly. "She's 140 feet high, 60 feet wide, and when she's up in the air 550,000 cubic feet of helium and 100,000 of hot air keep her up."
How would he know all of that? By knowing about a man named Steve Fossett, who in 2002 manned the first succesful solo round-the-world balloon flight. The balloon was called the "Solo Spirit" and is described this way:
"The Solo Spirit balloon uses a combination of helium and hot air to fly, a design known as a Roziere balloon. The balloon envelope is 140 feet tall and 60 feet wide. It contains 550,000 cubic feet of helium plus 100,000 cubic feet of hot air."
So, obviously "Henry" knew about the "Solo Spirit" and after a little bit of stalling was able to think up the dimensions from his memory. So yes, "Henry" is an other. A very smart other, but an other nonetheless.
Oh- and here's the link to the details of the "Solo Spirit."
http://solospirit.wustl.edu/flight.html