I trod on a squirrel while running. It was on the canal bank and although I kept thinking "any moment it will see me and run into the undergrowth" it didn't. But then when it did see me it ran ahead of me on the track. I had already decided to jump it, and my foot came down square on it. Luckily, as I looked over my shoulder it was running off the other way.

I don't think I'll ever stand on another live squirrel as long as I live. I wouldn't recommend it.