<human>: Could you distill the essence of the text into 1-3 sentences?

This happened a few years back.

My dad, little sister and I went to Chicago around Christmas time to walk around there and see all the lights and decorations and stuff. We had a good time, except we stayed a little late, and by the time we got back to the train station, we had missed the train and had to stay an extra hour. because we had been there all day, my dad decided just to stay at a Dunkin' Donuts near the escalators just outside the train platform. After we had been there for a while, my sister and I got bored and decided for some stupid reason that it would be a good idea to play on the escalators. We got up, and started going up and down. Then we thought it would be fun to go the opposite direction of them, and we started running. as I was running up the down escalator(I was maybe 12 at the time), I tripped and fell, and the ribbed part of the step went right into my knee. I screamed in pain, loud enough for everyone there to hear me, and we had to sit at the Dunkin' Donuts and use napkins to stop the blood flow, all the while with me crying, and wait for a security guard to come and patch me up.
<bot>: Waited at the train station, ran up the down escalator, gashed my knee and made a complete fool of myself, dad, and sister.