Tiny dancer: Parade participants came in all ages and sizes during the 2010 Dorchester Day Parade. Photo by Ed Forry

Dot Day 2010: Governor Deval Patrick, center, stepped off at the front of Sunday's parade along with other political leaders.

Scary moment: A nervous horse lost its footing near Dorchester Park in Lower Mills during Sunday's parade and fell, knocking its rider to the ground and sending spectators scattering. The horse was led off the parade route and no one was injured. Photo by Bill Forry