From Sonic Retro
Umbrella Descent, known as Parasol Fall (パラソル落下 Parasoru rakka) in Japanese, is one of Big the Cat's moves for Team Rose in Sonic Heroes. The Rose analogue of Triangle Dive, Umbrella Descent sees the fat cat pull out a parasol to slow down his team's fall. Amy and Cream grab onto the cat's back and they all float slowly downwards. To use this move, while in the air with Big, press and hold (GCN & Xbox)/ (PS2) to descend slowly to the ground or to ascend by using an updraft (usually from a giant fan).