Or perhaps it's his shilling of Super-Powers action figures from Kenner? Yeah, that's probably his biggest and best moment. What. I love the Super-Powers line.
He would later appear as Marty McFly's brother Dave in the Back to the Future movies, and as often happens with nostalgic Super-casting, McClure also appeared in Superman Returns (a cameo as a taxi driver) and in Smallville, as Dax-Ur, a Kryptonian scientist who has been living on Earth for over 100 years, loosely based on the Phantom Zone villain Jax-Ur. But we don't talk about that.