one of my more surreal work experiences was holding a meeting in an open plan office at a foreign branch of Pedigree pet foods and being brought to a complete standstill by the sight of a cat strolling along the top of the desk partitioning. Said cat being part of the in-house testing team.
From all accounts the IT team found them a bit of a headache as they liked curling up on top of the lovely warm laser printers- printers and stray fur is not a good combination.
I regard it as a bit of an occupational hazard. The last few times I've been able to identify the culprits- tree roots, unevenness in the pavement or foreign objects on the footpath. I've got a very low recovery stride (which gets worse when tired).