>>3252062"Guys, guys, the expected thing is that the other person will be surprised by the prank, so what if we do the UNEXPECTED thing and tell them beforehand, won't something cool and unexpected happen? What do you mean I'm ruining the surprise, I'm doing something never done before!"
Besides this most of chat are actually idiots who don't care about the authenticity of the reaction, only the reaction itself and how they're present at a 'clippable' moment. See the minecraft collab where Kiara blew up the bed and all the chats went wild, despite everyone having been spoilt by their chat beforehand and literally talking about it on stream.