A regular washing machine starting to work. She is in the zone and nobody can interrupt her or add something while she is doing what she started doing.

The person who pushed on her start button, trying to add something while she is working but he just can't. She is on her own, totally ignores him and his needs. it doesn't matter what he is saying, as long as she continue working and needs to end what she already started.

There is no room for mistakes, or interrupting the washing machine the minute you've pressed start.

But with the new Samsung ADD WASH washing machine all the above doesn't count, because you can actually add what you want with no interference to the washing machine