As a mother, I feel so badly for that boy's mom. Kids are crazy slippery creatures and can make a break for it the second you have your attention elsewhere. And unlike the internet hordes think, it is simply impossible to have your eyes on your kids every second.
Thankfully, I haven't ever lost Emily in a scary place like that. When she was that age, I had a harness for her because I was super paranoid about losing her. It was cute and had bat wings. Of course, there are people out there who think leases on toddlers makes them more like pets than people. I didn't give a crap what they thought though.
I do remember a story from my childhood. I was only about five or six years old. My sister is 18 months younger than I am, and was about three when we all went down to GA to visit my dad's brother and his family.
We went to Six Flags over GA while we were there. I think my aunt and uncle only had two kids at that time, and then my parents had me and my sister. So it was a pretty even adult to kid ratio. Despite this, my three year old sister wandered off. She didn't even know she was lost but it took our party a good fifteen minutes to find her.
I was little and I still remember this. I'm sure my mom remembered that until the day she died. Now that I'm a mom, I can't imagine the fear she must have felt while we were looking for my sister. Thankfully our story turned out okay.
And even though a gorilla died, the child's life was preserved. I know some people might not see it that way, but the zoo did what they had to save the child. And I'm sure that mom is beating herself up more than any nasty comment on the internet can. Her kid was hurt because of it!
So my prayers go out to that family and I hope no lasting damage happens to that little boy or his family. Parents are human too and it only take a second for a curious child to slip away.