We already have this with the dryer function... It's too hot to allow you to open the door and accept the risk yourself, so I need you to wait 10 minutes for the machine too cool before I unlock the door.

I have that with my washer. There's a catch on the door that won't open until it's CERTAIN spinning has stopped. Granted, that's a safety issue of sorts.

Of course it was the first part to fail. Of course you have to enter from behind to override it.