<human>: Can you give me the gist of the text in a nutshell?

This happened a few months ago when I used to manage a tech section at a retail store.  
A local high school for special needs scheduled a field trip to our store. These students were in their mid teens and had moderate to severe disabilities such as downs syndrome, non-verbal autism, etc. The purpose of the trip was to get a behind-the-scenes view of a common store to see if they had career potential or interest in cleaning, stocking, or otherwise.  
They spent the day dusting or cleaning screens, stocking ink, putting up prices, and other operational tasks under the supervision of another manager. There were about twenty students, so it was hard to turn a single aisle and not see one. They were cleaning our restrooms and, unfortunately for me, I had to fart. Like really bad. Like I wasn't going to go number two, but dear lord it was brewing.  
I found heaven in the receiving room. I released the longest, hottest silent fart that smelled like week-old roadkill. I leave the double doors with a great weight lifted from my abdomen. At least until the group heads for the back room to see our warehouse.  
They all go back and get a huge whiff. One of them starts either crying or his eyes were watering that badly. Then another due to the commotion. Then another. And another. A teacher thought one of the students shit themselves so she's herding each and everyone to the bathroom trying to keep calm. The manager with the group says over the walkie "good god who did this?!" Before I could even think of confessing, a coworker loudly broadcasted that it was probably one of the students. They all heard him from the bathrooms, where the rest of them begin to cry/rage/shut down.
<bot>: Left a deadly fart cloud for a class of disabled children. Pandemonium broke loose, trip ended quickly, and I'm going straight to hell.