That's gotta be embarrassing. Some random kid comes up to your house and asks, "Can I come in your pool?". Jeesh, I'm clenching my teeth just at the thought of it.
Maybe they were throwing water balloons at each other. I used to have a girl my age as a neighbor and we filled up a whole bunch of balloons up with water and threw them at each other. They were hard as **** and they never exploded on impact, so imagine having a balloon filled up with water getting whipped at your stomach, it felt like we were throwing basketballs at each other.