<human>: Give me a shortened version of the text

So as with most TIFUs, this happened about 3 years ago.

It was my little sister's birthday party. I want to say 9th but I have no idea, I'm bad with keeping track. She's having what's essentially a long gym class as her party with all her friends and my old elementary school teacher was hosting it. They do some normal gym games, I join in every now and then, but when you're so much older than everyone I had to go much easier on the kids. Then dodgeball was announced. I was reminded to go easy and I laughed and obliged. I was throwing the balls super lightly and still hitting them easily. I felt like a god among the children. Than I FU.
There's this Indian/American girl who I see isolated on the far left. The opportunity is perfect, so I wind up for the light toss. My brain shits out on me and end up throwing a Randy Johnson fastball that nails her clean in the face, knocking her onto the floor. As soon as the ball left my hand I could only think "oh fuck." She gets up off the floor, still in tact surprisingly, and hobbles over to jail. I see my old elementary school teacher laughing and face palming to which I unload apologies to everyone and felt so bad I sat out for the rest of dodgeball.
<bot>: I threw a ball as hard as I could at a child, knocking her to the floor at a friendly birthday party.