Continuity mistake: When Barry is getting angry at Adam downstairs he is wearing a Philadelphia flyer shirt. When Barry enters Adam's room he's wearing a Calgary Flames shirt. Then the camera shows Barry from behind he's wearing the Philadelphia Flyers shirt.
Barry Goldberg's Day Off - S2-E14
Continuity mistake: When Barry tips the pool chair and falls into the pool, the chair falls with him. However in the next clip when his mother jumps into the pool to save him you can see the same pool chair still sitting on the diving board.