Who blew the lid off the crapper?

I went to a friends house this weekend for a hen do and at some point during the night someone broke the toilet seat. I have no recollection of the last portion of the evening so hope it wasn't me. It's like someone dropped something on the seat itself as a potion of it has cracked off, or do you think it could be because someone was a bit too heavy in the placement of their **** on the seat?