<human>: This is something that happens to me on a regular day basis but the worst occasion of this happening was one of my best friends.
Everyone's in P.E. and we're playing some game, let's just say basketball, and everyone's joking around shit talking. Well a girl says something to my friend and without any chance to think he replies with the first thing that pops into his head, which is and this is a quote " I hope you die while running". He said it so fast that he didn't realize who he was talking to and then it settled and I saw his eyes widen. He accidentally said that to a girl who's sad dad died a year early from a heart attack. I just looked at him kind of saying did you just say that and he just stood their for a couple seconds. Luckily the girl didn't here him but he always tells that's story saying that it's the worst he's ever felt

Condense the text into a few key points
<bot>: my friend accidentally said to a girl that's dad died from a heart attack while running that he hope that she died while running