Vowel movement

I just ate four cans of alphabet soup...

...and just had the largest vowel movement ever.

I've accidentally swallowed some Scrabble tiles.

My next vowel movement could spell disaster.

I always thought it was vowel movement instead of bowel movement...

Which kind of makes sense if you think about it...

You’re on the toilet going Aaaaa.... Eeeee.... Iiiiii.... Oooooo.... Uuuuu...

And sometimes WHY?!?!