Clifty is a NUMA user who is known for making DDAs.
Clifty currently has 4.5 average rating, which he has kept for a very long time. He is said by many to be the best, rivalled only by lord_day, rocket_thumped, formica and nevermore. He is also extremely famous for being the highest-rated on NUMA.
Clifty has done all sorts of DDAs, including, Hold Left, Hold Right, and even a few Hold Any, where can chose to hold any movement button or nothing at all and still win. Out of all his DDAs, Deadly Nightshade, The Right Angle, Debris, The New Propulsion, Doors V, and Firecracker seem to be the ones with most appeal to the public.