I know, too much to handle
Well the scene was that I was watching a movie which was not ,strictly speaking, vegetarian ;)
a kissing scene came, and I heard someone entering my room. Immediately I pressed alt+tab to bring the window of wikipedia in front.
It was my dad. He asked "kya kar raha tha?" to which I innocently replied "kuch nahi". My dad just stood there and scanned me from head to toe for 10 seconds. Then finally when he was about to leave, he said something that made me realize, 'no matter how old I get, I'll always be way too immature when compared with my dad. What he said was, "chutiya samjha hai kya mujhe?" All my brain functions were dead for complete 2 mins and I was speechless.
Today when I narrate this incident to my friends, they all have a pretty good laugh at it :D