Dad here (didn't think I knew how to use this, did you?)

LB has hit a major milestone, he's started making fun of Daddy. The other night we were on the bed and we got to rolling around and I realized I was going to fall off with him on my chest, so I twisted so I landed under him and torqed my leg a bit, resulting in a brief series of "Ow"s...

Several minutes later, he climbed quickly off the bed, curled up on the floor and said "Ow" then broke out in giggles. Then said "Daddy fell on the floor." followed by more giggles.

Ahh, the joys of parenting. It'll make my dad very happy that LB's reached this important point.