Ah yes, the newly potty trained three year old. :-)
My youngest has quite a sweet tooth. Someone had given us a bag of those huge, individually wrapped life savers. I brought the kids in the house, went back out to the garage to bring in stuff. I came back in and my almost 3 year old had her mouth full. "What are you eating?" She immediately tried to swallow it, and it lodged in her throat. I grab her and hold her upside down, yelling at her 7 year old sister to call 911. As I'm pounding her on the back I can hear her sister on the phone, "She's choking, my mom is busy, she's trying to get her not to choke, I can open the door, she's still choking, my mom has her upside down.." She sounded down right bored, as if this happens at our house all the time. I can hear the firetruck coming up the street, and just as my older daughter runs to the door to let them in the candy comes flying out of the younger one's mouth. I set her down and she is all smiles. "Fireman!!!!" One fireman helps me find all the candy pieces, to make sure we got it all. Another is offering the little one a stuffed animal, which means she then has to lead the rest of them off to show them all her stuffed animals. One is pinning a bravery badge on the 7 year old for being so calm on the phone. They finally reconvene, decide everything is okay. We stand out front and wave goodbye to the fire truck, and I come in and collapse on the floor hugging my girls. At that point the newly potty trained almost three year old says "Oh no!! I forgot to show them my new underwear!"
And yes, since then they always come up with ways to make my heart skip a beat. From running off in airports (older one, when she was three) to jumping horses (younger one, starting at age 9).