A driver from Speedy Rent-A-Car found himself sliding into Gowanus Bay last week following a traffic mishap inside Sunset Park’s Bush Terminal. Officials said that the accident took place on Dec. 23 inside the yard near the corner of 43rd Street and First Avenue. Witnesses said that the driver apparently lost control of the van, which quickly found itself sliding on the waterfront’s icy edge. The vehicle plowed through the gate and vaulted down the slope just above the shoreline, officials said. It took rescuers about 15 minutes to get the driver out of the teetering vehicle. No injuries were reported.