To combat the hilarious rumour/accusation that Fabian Cancellara used a mini-motor to literally power his wins in the Tour of Flanders and Paris-Roubaix, the Tour is performing random scans of bikes to check for engines.
Of course, this being cycling, they have implemented the testing completely wrong:
The duty of taking bikes to the UCI scanners fell to the team mechanics, who had half an hour to comply.
Wait: the team mechanic has half an hour after the race finished to deliver the bike? Would that be the same team mechanic who would fit the motor in the first place?