I seen a B6 short turn to Nostrand Ave just now starting at Rockaway Parkway.. However it was an UP bus.
Took me back to when I was an kid and FLA operated the B6 short turns, even though those short turns stopped short of my school I preferred them cause they were less crowded than the regular B6 runs.
During rush hour their was an diverse amount of RTSs on the B6, GMCs, TMCs with both series 92 and repowered 50 EGR engines, and the 96 and 99 batches of Nova RTSs, good times. This was in the early 2000s BTW.