That is one very bad thing about these front-loaders with an electronic door lock. Once it locks, there is no stopping it, as they are designed to prevent opening while filled with water.
My father used to pull stupid pranks like that on us when we were kids. He even gave me a loaded handgun when I was a toddler and set me free.
I am sure the father is going to have nightmares for years to come, and the mother is going to beat his ass for years to come.....
Warning: Anything I post may not make any sense. All advice is for entertainment value only. Sarcasm might be present. Interpret at your own risk.