Marco put the hose through the window of the snug room and sprayed Vic, Jason and Stuart with water repeatedly until BB asked HMs not to use the hose inside the house.
Although they took it is good humour (considering how they were feeling) legally I think that constitutes a physical assault if someone wants to pursue it
Add several hours of continuous noise, plus Marco taunting Jason repeatedly (looking at the clip I'm not at all sure Marco wasn't doing 'up and down' hand movements as part of his 'dance') and them trashing the place where they all have to live for the next two months and it is hardly surprising Jason cracked in the end. Still not excusable, what he said tho. Thuggish...