Have you ever left your kids alone in the car? If you have, what was it to do and for how long? (No judgement!)

I know no one ever thought twice about it in the past, but it's a big no no nowadays. I've been so tempted when doing an ATM or dry cleaning run and my car is parked in front of huge class windows where I can see my kids the whole time. I've never done it, but I've wanted to leave my two kids because getting them in and out takes longer than the actual errand!