What you may be referring to (I didn't know it had an official name) is a few times during the day, there are CMs dressed in turn of the century costumes. They ride on the trolley (or maybe double decker bus?). It stops at a few locations along Main Street and they do a little song and dance for about 5 or 10 minutes to show tunes, like the Trolley Song (Clang Clang Clang Went the Trolley) and maybe a couple of numbers from other classic musicals. Nice little show, if you happen to catch it, but nothing to "wait" for.