just experienced inhaling helium for the first time.....

That can kill you.

Yeah. I did it a lot until there was a girl on the news who had inhaled hellium, and her tim, trái tim exploded, killing her.
She was at a birthday party, and the parent also gave the childen marijuana, which probably affected her, but it still scares me. o.o

Y'know, I don't remember my head hurting when I inhale helium...now I don't wanna inhale it after đọc the 2nd answer.