<human>: I remember being in my 6th grade history class when a teacher from down the hall came in to tell us a plane just crashed into one of the twin towers.  She said she didn't have many details and I wasn't listening all that well, but I remember thinking "oh. okay. I guess planes crash sometimes, this time it was just in a city."  My day went on like it normally did, going from there to computer studies, mathematics, English and science.  

When I got home, my mother was already there.  My sister had gone home sick that day, so my mother took the rest of the day off to take care of her.  As soon as I walked in the back door, she turned the TV off.  I noticed this only because she usually tells me what has been happening in the show she's watching.  I caught a glimpse of what was on the TV before she shut if off though.  it was an image of a burning building.  I didn't think much of it again, brushing it off as "a lot of buildings catch on fire."

It was a few weeks before I found out that it was a deliberate terrorist attack.  At that point, I figured the dust had settled (because as a 6th grader, shit settles in a matter of days).  

Fast forward a few years to my sophomore year in high school.  My health teacher had a collection of videos. She showed 1 or 2 every day.  It was an easy lesson plan for an old lady.  The topic of September 11th came up and not many of us had seen the footage of what happened.  She had a video all set up to watch.  She put it in and after about a minute, I don't think I've ever had such a gut wrenching feeling.  I can't imagine being 12 years old with that kind of emotional baggage, and suddenly it hit me: my family, friends, teachers, everyone had seen this and knew about it for years before me and they've been carrying around these memories for so long.  I can't imagine how that must feel.

Summarize the given text in a few sentences.
<bot>: Grandma fell in the tub again and her knee replacement slipped out of place.  I fixed it with a basketball.