Joe (The Green Buffalo)

Joe ran a general store in Lusk, Wyoming. In 1891, he joined a hunting party in the employ of paleontologist John Hatcher. While Joe and his band were hunting, they encountered a ripple in time (something they didn't realize), briefly being transported to prehistoric Wyoming. They quick retrace their steps, and returned to the present day. While tracking a herd of buffalo, Joe and his men discovered a Torosaurus had wandered in with the herd. Not realizing what it was, Joe and his men killed and butchered the "green buffalo", and brought the meat back to the camp.

Joe never realized what they'd killed, and Hatcher never learned that he'd eaten a living specimen of the creatures he studied.