Reminds me of one of my favourite jokes:

A QA person walks into a pub.
Runs into a pub.
Slides into a pub.
Jumps into a pub.
Flies into a pub.
And orders:
A beer.
2 beers.
0 beers.
-1 beers.
9999999 beers.
NaN beers.
The left half of a beer.
“qwertyuiop” beers.
All tests passed.
A real customer walks into the pub and asks for the bathroom.
The pub bursts into flames.