When you only signed up for Facebook to enter a yoyo contest. Then you only added yoyoers as friends (a few friend requests notwithstanding). Then you only have status updates about yoyo. Then you discover groups related to yoyo and join them.
In short,
When you get friend requests from IRL friends and family and the first thing you do is write them a message with a disclaimer about how you only use FB for yoyo.
When you make a yoyo out of stuff you find laying around (2 different types of Bottle caps, a small nut and bolt, clay, 2 small washers, and one of those beads that melt with a iron) and it works.
When you mod a quarter party favor yoyo by…
-popping off the caps
-sticking sticky tack inside
-reassembling it
-switching the string out for a yoyo string
and it works, even sleeps