I know what you mean about 'em being quick...my eldest son when he was about 18 months old, was sitting on my husband's lap at Schlotzky's Sandwich shop in Tyler Texas. Hubby had a bowl of cheese soup on the tray pushed back to the back of the table so my son couldn't reach it.
With both of us sitting there, by son shot his hand out, grabbed the tray, pulled it toward him and with the other hand stuck it in the soup!
I jerked his hand out (this all happened in an instant, I'm sure you can imagine what I mean) and instantly stuck his hand in my mouth. It was like a reflex. The cheesy soup on his fingers BLISTERED my tongue and the inside of my cheek. My husband, all in the same instant, jerked his hand out of my mouth and stuck it in his ice cold coke!
His hand just blistered up. I was sick. We left our food and went straight to his pediatrician. Praise God, they were just surface blisters. We had to put Silvadene cream on his hand for a while and wrap it, but he didn't have any deep scarring.
The speed at which all that happened is still something hard to explain.
I've always been amazed at the speed with which they move... Of course, I also remember my mother chasing me, and by the time she reached the end of the driveway, I was waaaaaaay up the road... leaving her standing there shaking her fist yelling "You've gotta come home sometime!"