Chainsaws were originally invented for helping with childbirth. They were not meant for cutting wood.
Before Cesarean sections if a baby was too large to pass through the birth canal, parts of the pelvis would be removed.
At first, the procedure was performed with a small knife which was very messy and painful.
In 1780, two doctors invented the chainsaw to make the removal both easier and less time-consuming.
The original chainsaws were powered by a hand crank.
Well, there you have it, the unexpected and super terrifying history of the chainsaw.