When you survive a 4 man turret dive.

The enemy uses everything they have to try and kill you and you live with 10HP, feels GREAT! So you spam your laugh. https://youtu.be/wcinzmfZeCc (I'd post a gif but lets face a Mark Hamill Joker Laugh needs sound to truly be appreciated)

Then your ulted by Karthus 5 seconds later.

http://www.demaciancomics.com/albums/userpics/10643/normal_goku.png

damn it......

Edit: and yes this did just happen to me ;w;