------this cowboy should have picked a smaller "horse".

A 25-year-old man either jumped or climbed onto a moving 18-wheeler before starting to dance, authorities in Texas said.

But when the semitrailer traveling south on the Eastex Freeway passed underneath a bridge, the dancing man slammed into the overpass and was knocked off the vehicle, according to a Nov. 14 news release from the Houston Police Department. He landed on the freeway below.