I was at a 2 year old's birthday party today with my ds (who will be 2 at the end of July). He went to get into an inflatable ball pool, in which there was another child, whose mother was sat on the floor next to the ball pool(I haven't seen either of them before, so don't know her). Her child put his hand up and pushed mine in the face. I said 'there's plenty of room for two in there!!' and lifted my son in. He got straight out, but when he approached the side again to climb back in, the same thing happened!
I said the same and did the same, but I've since been wondering what you are supposed to do in these situations, because I know that there will be many more occasions when someone else's child does something to mine that I will think is unacceptable. I can't believe his mother didn't tell the other child not to push mine in the face,or give me an apologetic look or shrug at the very least.