I have this random memory from like a year ago: when I was at school someone brought a chocolate cake in because it was her birthday. Except she didn't bring a knife and it wasn't cut before hand so it was pretty much a free for all of everyone crowding around like some kind of cult, trying to grab a slice from the bombsite that the cake was quickly becoming. Also one of the teachers walked into class early to see what was left of the cake and about 20 students with handfuls of cake.

Safe to say whenever someone brought in cake after that, they remembered to cut slices out beforehand.

It looked something like this at the end: