Continuity mistake: As Porky's Riverboat nears the draw bridge, you see Pee Wee activate the bridge so that it begins to lower. Look at the angle of the bridge as Pee Wee is running by it, making his getaway. The bridge is almost down. The scene cuts to the River Boat's view and you can see that the draw bridge is all the way up and just starting to come down.
More mistakes in Porky's Revenge