50 animated gifs of dogs making fools of themselves. Viewed while at home sick, it sent me into uncontrollable fits of coughing, the likes that almost asphyxiated me, and I had only counted down to #39 at that point. OMG, so much funny hilarity. I had to view the rest in smaller groups to protect my own mortality.
See them all here.
I can't even pick a favorite. But maybe... on, I just really can't. Okay maybe #42.