I've always regretted never having seen it, but The Back Gate reminisces about the world-famous, now-defunct annual Huntsville Prison Rodeo, which in its day drew as about as many spectators as (100,000+) as a big-league college football game. The new Back Gate website doesn't have permalinks to its articles, but go visit them and scroll down.
Reports the Texas Prison Museum,
A favorite event unique to the Texas Prison Rodeo was the Hard Money Event. Forty Inmates with red shirts were turned into the arena with a raging wild bull with a Bull Durham tobacco sack tied between its horns. The object was for some brave inmate to get the sack and take it to the Judge. Fifty dollars had been placed in the sack but donations often ran the pay up, sometimes to $1500. This became a very popular event for the inmates due to the amount of money involved and was one of the most dangerous ones as well. The fast action kept fans on the edge of their seats throughout the event.