Quoting FroggysMommy:" This. And sometimes when people choke they don't make the gasping noise or anything. So unless their ... [snip!] ... smurf happens... unless they gave the coin to your kid and watched him choke without doing anything, dont demonize them."
The experience that comes to my mind.. I use to let my teenage cousin (Who loves kids) babysit my daughter. One night she spent the night with me. I had Alyssa in a bath, and asked my cousin to keep an eye on her for a minute. (I was putting clothes away and in my closet. My cousin was on the bed. From where she was sitting, you could see directly in, literally a jump away and you are at the tub.
I come out of my closet, glance in the bathroom and I don't see Alyssa. So I ask my cousin, "Where is Alyssa?"
Not even looking up from her phone she shrugs her shoulders and says, "I dunno."
I ran into the bathroom at that point, and Alyssa was on her back. Thankfully the tub wasn't full enough to where her head went under and when she saw me she just smiled.
That was the last time I let her babysit for me.