"Rolling on the floor" is an important part of the game. Depending on disc selection, the type and slope of terrain, and angle that the disc makes contact, the

"Rolling on the floor" is an important part of the game. Depending on disc selection, the type and slope of terrain, and angle that the disc makes contact, the amount and direction (forehand vs backhand) of spin, etc it can "spike" into the ground, it can lightly touch and stop immediately, it can roll 20 feet to the left or to the right, it can "skip" and fly another 100 feet, it can roll for another 300 feet, etc. The best players can control this behavior and use it to shape their shots around trees, hills, hazards, rough grass, etc. Discs with thick, round rims (generally "putters") already stop pretty short when they land. It's the distance drivers with sharp edges that can roll a long way, but those are very aerodynamically designed and bumps would probably mess that up. Plus, there's regulations about the size and weight of discs, so it might not be allowed on PDGA tour anyway.