Just south of Preston, Texas, 1847. Two cow-pokes sitting out on the range as the sun settles over the bluffs. It's been a long, dusty day on a long cattle drive north. Tomorrow, the river crossing.
Billy takes a deep pull from his flask...
"Hey Bobby Joe, betcha I can ride that bull longer than you can."
[Truth is more like: Paso del Toro, Mexico, 1598: "Eh, Juan, apuesto a que puedo montar ese grande toro mas tiempo que tu!"]