Correction Notice: 1018. Farley Next to the door talking about your mind (Sesame Street Muppet Sketch, Farley and Your Mind), as seen on Sesame Street episode 1781 on PBS (which is NOT on Noggin)- he hears knocks, Herry Monster Breaks Down Farley's Door, and pushes Farley to the wall. (Circa 1973)
Circa 1977/Circa 1978- Song: I Can't Help It by Herry Monster (with Luis & David at the Fix-It-Shop)- Herry destroys several things at the Fix-It Shop: Blender, Telephone, and lamp, knocks boxes down and destroys several things at the Fix-It Shop with his incredible strength. Before that he breaks the door at the Fix-It Shop.
Actually John-John has counted to 20 with both characters (and both clips are up at sesamestreet.org... I think the one with Grover is just listed as "Grover and John-John Count", and I think the exact same title is also used for the counting backwards segment).