lol obviously a metal frame going up through his trouser.
^ I'd go with that.
Yup, absolutely! The rig-ups for these things is made from Inconel 625, the strongest metal on earth and used in critical machine parts. The frame is bedded into the base into the shoe (so the base and shoe are a whole, fixed object) and a snaked pole up to a seat-shaped thingy. Slip the trousers over the rig, then him into the trousers ... hey presto! The set-up would be the give away as he wouldn't just walk up and sit; that dais would be curtained so's to set-up then removed to reveal the block with a metal rod up his arse!
Lol, it's ventriloquism, except his lips haven't moved yet.
Don't know about you guys, but sitting with my legs crossed like in the vid, I would need to let my leg down again after 5 minutes! I wonder how long he had to sit there for?
lol, all agree with the frame.
hmmm does that mean he has to remove his trousers to dismount?