There have been loads:

The best was the puppet show. I saw the dress rehearsal on E4 when I got home from work. The best bit was Kate, as Davina, telling Spencer he had been evicted, and Spencer saying "You sound like you're talking to someone who gives a $hit"!

The drunk Kate falling over when she was trying to put all those clothes on at once whilst drunk

Jonny and Sophie's "air" fight.

Jerry Springer

Alison's exit when she fell over.

The Love Train.

Kate, Alison and Sunita talking about Alex, ended with Sunita saying "He needs to get in touch with his masculine side".

Sophie, just evicted, when she saw that it was Jonny who had hid under her bed and tapped her in the dead of night.

Almost all of the horseplay involving Jonny and Kate in the last week or so.

There were so many though.