It’s not good to laugh when someone falls over, but most of the time we just can’t help to giggle.
It’s nervous laughter that just comes over you, well, that’s my excuse anyway.
When your day isn’t going exactly to plan you can pretty much be guaranteed that it’s going a whole lot worse for someone else who is facing a mishap of their own.
Take this album of photos on Imgur for example. Just try and not laugh at some of these misfortunes: