<human>: This actually happened yesterday, but here goes.

In the middle of studying for an exam, I needed to go to the bathroom. After I had completed my conquest, I stood up and began pulling up my pajamas. As I was doing this, I noticed there was still some toilet paper in the bottom of the toilet so I flushed yet again.

As the toilet was flushing, I finished pulling up my pajamas but in doing so hit the key(which was in my right pant pocket) and managed to knock it out of my pocket directly into the bottom of the toilet bowl. As the toilet had almost finished flushing, I didn't have time to grab it and well...it was gone.

In case you're wondering, it's a light weight FOB key and I didn't have it attached to anything else. The key takes 3-4 business days to replace as the dealership has to order and then program a new one. I live 45 minutes from campus and this occurred about 2 hours before my exam. Also I'm irresponsible and have no spare.  

Despite the shame, I called my teacher(who was luckily in her office) explaining that I had flushed my key down the toilet and may not be able to make it to lecture for the exam due to lack of transportation.

Probably realizing that is the worst excuse she has ever had for someone missing an exam, she believed me and considered this an excused absence which will allow me to retake the exam when I get a new key and can make it to class.  

To make matters worse, my wallet is currently inside my car which I have no way to open and I have no form of identification or method for paying for anything. I called my mom and told her what happened and that I needed a new key which I had no way to pay for since my debit/credit cards are in my car. She laughed at me and ask if I thought she would really believe something like that. I told her if I was going to make an excuse for losing my car key, I would sure as hell come up with a better one than I flushed it down the toilet. She promptly ordered me a new key.

Can you summarize the given text in a few sentences?
<bot>: TIFU by accidentally flushing my car key down toilet, missed exam, teacher bought it, get to make up exam at later date