Yeah, I can see where you are coming from, I'm definitely not the kind of person to laugh at suffering animals either. The reason I found it funny was that judging by the position of the roof of the building in the background, the height was very low. There's also a fence in the foreground so it didn't look like the cat jumped off any higher altitude than a ground floor window, probably a metre or so in height, so it didn't occur to me it could have hurt itself.
That said, I do agree it was insensitive of me not to take into account the cat may have been hurt. Maybe it saw something not comfortable to land on below, hence the strange jump position. I understand it may have been upsetting and I do apologise for posting this.