Using a razor-sharp Samurai sword to chop through two cucumbers without slicing off that other dude's hands...
A watermelon on the guy's stomach. OMG, you rule so hard.
In 1984, he came back on, this time demonstrating some way less interesting horse tricks.
Except it was kind of hilarious when he brought out his wife at the time, Marcy, to "play the part of the calf trying to get back to the herd" while Shatner's horse expertly prevents her from doing so.
But for all that other insane ninja stuff? You are glorious and wise, Sensei.