But with a roll of 3M Gaffa Tape, you can secure an hotel room door such that those inside inside the room can't open it without help from outside.
* other brands of very sticky strong tape are available.
* other brands of very sticky strong tape are available.
See page 64: https://www.austinpowder.com/wp-content/uploads/2019/01/The-...
Not explosive in and of themselves, but a component in modern industrial explosives. As a sensitizer and a density modifier.
Do likewise at the bottom edge, adding a seal to the floor / carpet. Don't be frugal (these are drunk roadies in full prank mode)... use your imagination ;)