What’s the last thing that made you laugh till you cried?

Oh! This actually just happened to me day before yesterday. I was at my friend's house and he was really focused on a video game he was playing, so I decided to prank him. He has this big ass speaker in the back of the room so I grabbed a footstool, put it next to him, and then unplugged the speaker and dragged it across the room to put it on the footstool. Then I plugged it in, cranked the volume up to max, paired my phone with it, and played a heavily distorted "ear rape" version of the Windows XP startup noise and it startled the shit out of both of us. I laughed so hard my ribs hurt and my eyes were tearing up.