This character is seen on Growing Pains and Just the Ten of Us.
We see an old house at night. An insane-looking man walking on the left side of the roof stumbles and falls two stories into some bushes below. Superimposed on the screen is:
A Guntzelman Sullivan
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The character then cuts to the current WB Television character of the time.
Medium to high. The dark image and the good-looking man falling off the roof may probably give more than a few the creeps, but those who enjoy black comedy may find this character hilarious.