This happened to me a few years ago...
It was 1:30 AM and my parents were asleep. I shut my door and went to pornotube with the intention of murdering my penis. Unfortunately my door slowly started opening while I was working my thing because I didn't shut it all the way. By the time I was almost done, I heard footsteps. Someone was walking into MY bathroom. Wtf, use your own bathroom, dickhead. I slowed down, but didn't think anything of it because I assumed my door was shut... This almost ruined my boner, so I had to start over...and for some reason I decided to turn around because I was really getting into it.
HOLY SHIT MY DOOR WAS OPEN THE WHOLE TIME FUCK FUCK FUCK THE BATHROOM DOOR ALMOST DIRECTLY ACROSS FROM MY ROOM IS SHUT FUCK FUCK FUCK I'M CAUGHT FUCK FUCK FUCK
I put my shorts back on, hit ALT+F4, and then jumped onto my bed facing the wall...but I forgot I had headphones on...so they come unplugged when I jumped onto my bed. The bathroom door opens and the LOUDEST FUCKING MOANING PLAYS. I turn to my computer and THE PORN DIDN'T CLOSE WHAT THE FUCK I HIT ALT F4 WHAT THE FUCK OH SHIT I CLICKED ON THE FLASH VIDEO AND HIT IT SO IT DIDN'T DO ANYTHING FUCK FUCK FUCK
My dad runs into my room and sees a chick getting railed from behind and then (I assume) turns to me laying there on my bed facing the wall. I hear my door being shut and I quickly turn off the porn, jump back on my bed, and lay there for a few hours before I finally go to sleep.
You can imagine how awkward the next few days were...
Little advice, kids: Make sure you click on the page before you try hitting ALT + F4 to close your porn.