Saddle Sore.

All the same, I don't know what he's so worried about.  Most of the horses I've met were pretty good-natured.  Not that I ride often (except for the Equestrian at the Olympics).  Anyway, in case you're wondering why Peach looks so panicked it's because we're doing a historical reenactment of Sybil Ludington (look her up, she's interesting).