Revealing mistake: When Stewart's wrestling with the alligator look closely and you can see the black strap keeping its jaw shut.
Frogs (1972)
1 revealing mistake - chronological order
Directed by: George McCowan
Starring: Sam Elliott, Ray Milland, Adam Roarke, Joan Van Ark
Continuity mistake: Pickett Smith has his shirt sleeves rolled up at the movie's beginning, then they're rolled down and buttoned then rolled back up before his canoe gets knocked over.