What was the MOST EMBARASSING experience you had?

i think this is the most stupid thing i did. it monday morning and i was late in class. when i reached in our classroom, the lights were off because their watching something, so entered, i cant see my classmates though so i continue watching the movie and i noticed why its about christ when our subject here is supposed to be gender studies, i looked outside and saw my classmate. i got his attention and he was puzzled why i was sitting inside that room i got outside and asked him arent you going inside, he asked me what i was doing there and told me our room was there and pointed at the room beside the room where he saw me..