Ahhhh ... the notorious 'brown smoke problem', eh ??
I had that too once when I was a kid with my model rocket .. it never worked out too well unfortunately .. the final 'cap' used to pop the parachute out, (for secure landing), always used to end up blowing the rocket into two pieces which ended up fluttering back to earth. I hope the designers of this one played with model rockets when they were kids !??
'Standing room only' ???
Sounds like it'll be so crowded with dummies there won't be any room left for a human !
This thing's going to hit, what say 8 to 9 G's on take off ??
The (one) human is going to have to have pretty 'meaty' quads to withstand that force for what, say 5 - 10 minutes ??
Good luck to 'em !!
(I wonder whether Mr. Pressure has been consulted on the design of this thing ? .. He seems to live nearby to Denmark .. maybe he's in the photos

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Thanks for the update, Lydia !
Keep us informed on the progress !
Cheers