Continuity mistake: When Butch suggests to Stan and Oliver about getting a blowtorch to melt the lock off, the saw which Stan is using is by Butch. When Oliver says "That's a good idea!", we return to Butch in the trunk and the saw has gone.
Continuity mistake: When Oliver has finished talking to the lady about the trip on the telephone, there is a milk stain on his tie. When he goes over to collect his waistcoat from Stan, the stain has disappeared.