The box had been cut with window "shutters" that would open and close. She pushed her head out through the shutters, and when she tried to pull her head back in, they closed on either side of her neck and she suffocated. Her mom was right down the hall, folding laundry.
It's not a reason to stop letting kids play in boxes -- just cut the windows as big holes without flaps. But that's haunted me for years.
Wow, that is horrible. I'm always paranoid about those kind of freak accidents. One moment can change your life forever.