Continuity mistake: At Hoover Dam, Clark pulls out a small rock and causes a little leak. While he's fixing, it another develops. He puts his left side against the second leak to hold it until he gets the gum in the hole. The water stain on his shirt changes from his left side to his right side, then eventually his entire shirt, in different shots.
Continuity mistake: In the Keno scene, after Ellen fills out the Keno card, she gets up and walks to a counter to turn in the card. While that is happening, Clark has a conversation with Mr. Ellis. During close-ups of Clark during the conversation, Ellen's shoulder and the shiny sequined dress she is wearing can be seen next to Clark. Ellen is there one moment, gone the next, back again and then Ellen is shown returning from the counter to her seat.Professor Zed
Continuity mistake: In the Hoover Dam scene, the tour group is walking through an underground tunnel when Clark messes with the wall and more water than normal starts coming out. He gets gum from Audrey and starts plugging the holes. He puts gum on the first hole and when the gum makes a bubble filling with water, he puts another chewed piece on the bubble. In the next shot, there is no piece on the bubble and he puts a chewed piece on another hole in the wall.moviemogul
Continuity mistake: When Clark and Ellen are on the plane and go to the restroom to join the mile high club. Ellen goes to the back of the plane while Clark goes to the front.