I ride quite a lot at the Sepulveda Basin bike path in Los Angeles, where I've had several encounters with squirrels that I swear were playing chicken with me. They leap onto the trail, visibly ponder darting through my cranks—which for them must seem a challenge akin to those windmill holes at miniature golf courses, except they're the ball—then instead veer parallel with my front wheel and pace me. I slow down, they slow down. I speed up, they speed up. I really have to come to a complete stop to avoid a squirrel wreck, and I just know they scamper off talking trash about me. You gotta watch those city squirrels; they won't hesitate to throw down with you over whose trail it really is!

As for MUT annoyances, my vote goes to the folks who rent those surrey-like pedicabs—which are explicitly restricted to the interior of the park, where there's plenty of trail to pedal whilst enjoying lovely views of the park's lake and its resident wild fowl—and take 'em on out to the exterior loop, which really is intended for more fitness-minded pursuits (though when I see how underinflated those pedicab tires are, I have to admit those folks are apt to get the better workout), to noodle to and fro. Those rigs are impossible to turn with any kind of acumen, so avoiding collisions is up to anyone but the pedicab drivers.