This Bites.

3am. Cue inconsolable screaming.

3:10am. Cue parents who don't understand why their son is screaming like they've never heard before.

3:31am. Dad come back to bed after some tylenol and 20 minutes of rocking. Dad says, "If he wakes up screaming like that again, we're taking him straight to the ER." Mum and Dad are both worried about baby, and unsure as to what just happened.

11:34am. Mum sees tooth number two. Right next to tooth number one.

Ah. It all makes sense now.