“Another archenemy of Bugs Bunny, Yosemite Sam is an animated prospector who hates rabbits. It happens that Bugs Bunny crosses his path many times, usually getting the best of the crotchety old cowboy with the quick temper.
When his temper explodes, as it often does, his guns can blaze as seen in this barroom altercation in one of his television episodes.
Yosemite Sam is no match for Bugs Bunny, though. It is obvious that Sam “crosses the line” in gullibility.
Created in 1945, Yosemite Sam was rough and tough. But for some odd reason, he often waxed religious immediately before finishing off Bugs, by saying, “Say your prayers, rabbit.” In the meantime, his nemesis would outsmart him and foil his victory.” – http://www.examiner.com/article/another-bugs-bunny-nemesis-yosemite-sam