Visible crew/equipment: In the opening scene, when Inspector Blake informs Stan and Arthur that the 10:45 bus has arrived, the camera pans over to the door of the bus where another cameraman's shadow can be seen on the side of the bus.
Revealing mistake: When the drunk Olive is standing on the chair lifting her skirt up it's obvious that Michael Robbins the actor who plays Arthur is trying very hard not to laugh.
Revealing mistake: In the first scene of part two Jack and Linda are supposed to be kissing but their lips are not touching.
Visible crew/equipment: When Stan is lifting Linda up onto the bus' bonnet so she can see into the driver's cab, if you look through the windscreen you can see a crew member behind the bus.