Plot hole: There is no reason for there to be sinks in the bathrooms. The cars may be able to use sinks just as they use toilets, but in the bathrooms they are too small and too inaccessible for any use.
Cars 2 (2011)
1 plot hole
Directed by: John Lasseter, Brad Lewis
Starring: Michael Caine, Owen Wilson, Emily Mortimer, Larry the Cable Guy
Continuity mistake: Tony Trihull appears when Finn McMissile begins chasing Professor Z. It also shows when Tony uses his magnet. When it is used, Finn's equipment are pulled by the magnet, which includes his bullets. Those bullets are black when all of them were going out. However, when they are pulled onto the magnet they are grey.
Finn McMissile: Siddley. Paris, tout de suite.
Mater: Two of them sweets for me too.
Trivia: During the last race in London, Lightening passes by a sign that is advertising Lassetyre. That is a shout out to John Lasseter one of the directors of the movie.
Answer: They heard him recording the message to Finn and found his words suspicious.