When I was visiting to see the Greek Herc tonight a Cougar surprised me with a fuel stop at apron East: S-441 ATA2140LT/ATD2205LT. It didn't use any lights, other than its big front shiner on final approach. After landing I could only HEAR it taxi, until it slowly moved into the shimmery light of apron East's light posts. Anyway, without getting too poetic, it was a nice surprise. After departure it joined 'Wolfhound 70', which was already in the GLV-V.