I put my friends phone in a washing machine

I was at my friends house and it got dark. I was about to leave but I realised I had left my phone in the living room. I went back to the living room and as I opened his cupboard, I noticed that the washing machine was open. I just wanted to use it to dry my phone. I turned it on and put the phone in it. I left the room and a few seconds later I heard it fall. I looked at his phone and saw that the screen was cracked and the home screen was a mess. I didn’t tell him I did it.