Just that. My 2.5 year old scared the crap out of me today. I was at an outdoor play centre thing and he was sat on the bench next to me. I was holding the baby. I was distracted for what must have been ten seconds by a conversation with someone wanting to take the toys we had brought with us, and when I looked again he had gone. 
Luckily he had only gone inside the cafe as he knew some family members were in there, but I had about 20 seconds of pure terror when I had no clue where he was.
Anyone else ever experience this?
- and am I useless? It's so difficult watching their every move especially with a baby stuck to your side too 
