What's a gag?

This may be a dumb question but what is a "gag"? Were there "gags" in the first game?

There weren't gags in the first one, this is new to the second. The gags are weird things that happen during the games, apparently randomly. For example, a cow will start jumping rope, a pig will play a violin, a bear will come up through a manhole in the field. When you see one of these, click on it and it will show a checkmark every time the gag reappears. I think there's something like 17 of them although I've only seen about 8 so far.

Wow, cute. Thank you so much, Peutetre.

So that's why my chicken started knitting

Make sure you watch the map page too I've seen one there.

I finally saw a gag today. A cat went across my screen playing with a yo-yo. So cool!!! And, yes I clicked on it.

I've seen about 4 gags so far.
For anyone that completed the game how many are there to get the award?