Hello,
After watching Matilda the musical in music class, we are designing and describing our own chokey!
This is what mine looks like:

As you can see it is in the shape of a person with their arms straight out and legs apart. Inside there are sharp shards of glass sticking out of the walls, if you dare touch the glass you will turn on the shower head and it will pour all over you. If you are lucky, the shower head will turn off midway. There are needles inside that are basically alive, the closer you go to it the closer the needles will go to you, touching will be a bad idea, you would most likely get injected. You better have strong arms and legs to hold them up for a long time!