<human>: Can you summarize the given text in a few sentences?

This happened a few months ago. I had just moved back in with my folks after getting my degree and amassing the huge student loan debt that comes with it. After living on my own, or with room-mates for roughly four years, I'd become used to being able to act like a fucking weirdo at home with nobody around to witness it.

Anyways, I was watching TV in my room while doing a bit of tidying up. Everyone else was gone, and I was entertaining myself by doing celebrity impressions making fun of the idiotic commercials that were on. One commercial in particular that I thought was incredibly stupid was for the Clear-Blue Pregnancy Test, which was advertised by some pompous British dame as "The most technologically advanced pregnancy test ever created." 

"Come on, it's not a new car, it's a fucking pregnancy test", I thought to myself.

So I took a deep breath, and in my best Tricky Dick voice, bellowed at the television the following endorsement:

"IT'S THE MOST SOPHISTICATED PIECE OF PLASTIC YOU WILL EVER PEE ON!!! I'M RICHARD NIXON!!!!"

I then proceeded to make a loud, angry sound with my face that I can only describe as when somebody demonstrates the act of motor-boating.

To my dismay, the next thing I noticed out of the corner of my eye, was my dear mother standing in the doorway, mouth agape. I hadn't heard her walk into the house. Of course the commercial was long over, as if I could justify what the fuck I was doing. She simply turned around and walked out, leaving me attempting to babble some kind of explanation. We haven't spoken about it since. I'm surprised she didn't try to have me committed after that.
<bot>: Thought I was at home alone, was bored, shouted at a pregnancy test commercial in a Richard Nixon voice, only to find out mom had just got home.