Continuity mistake: At the beginning when Dr Cox is talking to Dr Kelso, behind Dr Cox is a women handling a green stuffed toy which she puts down. The shot then cuts to the son and wife of Dr Cox and then back. The woman has the stuffed toy back in her hands.
Continuity mistake: When the woman in the tub comes crashing through JD's roof the pieces of wood around her change position between the shots.
Continuity mistake: When Elliot and her new boyfriend are sitting outside in the car Elliot's seat belt change position between the shots.
Continuity mistake: When the girl in the bathtub comes crashing through the ceiling, she has her hands covering her upper chest and no bath bubbles. The next shot there is a great deal of bath bubbles all over her and we cannot see her hands covering her chest. As the guy falls through the ceiling, the bubbles on the woman again disappear and we see her hands.
Answer: This is an American comedian called Scott Thompson, more widely known by his stage name of "Carrot Top".
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