[wheybags]

Some of them look like semi permanent exhibits in a large space, surely those ones must be glued? The wind from people walking around would blow them over otherwise, no?

[rapnie]

There's some videos on this on the site, where he also blows the structures apart with a wind machine at the end of an exhibition, and topples the towers he built by running into them.

[faeyanpiraat]

How can I find those videos?

[rapnie]

https://www.cardstacker.com/videos

[BorisTheBrave]

I see he often places multiple cards flat against each other - probably gives the structure more weight against random gusts and jostles.