It's branding time.
The set up: mama cows and their 200 lb babies are driven into a pen by men on horseback. Then, all the mama cows are squeezed out of the pen without their calves. They all rush out, but once they realize their calves aren't with them, they start to bawl and weep and moan and gnash their teeth. It's a loud and anxious time. Then when most of the cows are out and calves are in they let in the ropers.
They rope a calf by the hind legs and drag it to the fire.
The wrestlers stretch the calf out so it can be branded and rendered nutless.
It's marked on the back so the ropers know not to rope it again.
Repeat and Repeat and Repeat until all the calves are done.
Then they let the calves out in a big rush and its pandemonium as the mothers search for their babies and babies search for their mamas. They all find the right pair up and peace reigns again amongst the herd. Until weaning time......