Just break your leg from jumping down a high ledge.
You will want to climb about two stories up. Grab some wood and make about 20 frames. Once crafted place them straight down below you while you jump up in the air. This will allow you to get easy height. Then jump off of your newly made tower and land on the ground.
As long as there is no hay bales below you to land on you should break your legs.
If you sprain your ankle on the first jump just climb up something again and jump down to break your legs.