First of all, I'd have to turn around to get my headset from the bookshelf. Remove my headphones from the plug, plug the headset in.
Then mess with audacity which fails to work half the time. Then record it a bunch of time, make sure it's loud enough and I don't have noise coming from somewhere. Then cut it, encode to mp3. Then upload somewhere.
All that would take easily 5 minutes. I'm not gonna do that to give you a 5 second laugh. If you upload a sound clip of you laughing for 5 minutes in continuation (without using a loop or something), then I'll do it.