The worst I've ever seen is my 5 month pregnant teacher faking a miscarriage. She had had like 4 miscarriages in a row before this.
This was when I went to a Christian school, so our Bible teacher had come in and was praying over her, She's laying on the floor acting like she's going into labor, our principal was freaking out and acting like he was calling 911, so we all gather around and are praying and the bible teacher is praying out loud. Well every couple words he mumbles April Fools, but we were all so freaked no ever caught it. this went on for about 10-15 minutes (maybe not even that long but it felt like an eternity) so finally she goes ok this is getting old it was a joke someone help me up. Now if that's not screwed up I don't know what is.