When I was a kid I loved going to the La Brea Tar Pits in Los Angeles. The sabertooths were my favorite. 

People always used to call them sabertooth tigers but then I found out that they weren't really tigers. The preferred nomenclature is "saber-toothed cat." Kinda dorky, but the animal is still wicked cool. 

Check out these teeth!

Photo from http://www.nps.gov/hafo/naturescience/sabertooth-cat.htm