The thread 'Things people find in cars' was being a bit sidetracked so I thought I would start one dealing with foreign bodies in race cars.
Tin tops usually have far more room to be culprits, I know I have as have many others.
Personally I have had fire extinguishers come loose in the car, I have found the odd spanner or screwdriver emerge from under the seat too.. Or once I still had sundry parts and a drum of gear oil left in the boot!
Well known story from one of Stonies books about Team Brock running late for practice at Sandown in the L34 days. Phil Brock takes off and the car is less than satisfactory in the handling,, Phil comes in and Garnet Bateson opens the boot,, Around the back Phil, the boot had rims, toolboxes etc left in it. So not just us mere mortal amatuers!
The call over the pit PA at a speedway event 'will whoever lost a sledge hammer on the track' please report to the steward. Noone claimmed it!
F1 cars have it seems also found sundry tool rolling around the footwell too.
I am sure many others have similar stories.