My best ninja was on MLG Construct from top sword down to the hill. The guy shot me and I just jumped down and embarassed him with a backsmack.
My best move was S1 S2 on Guardian followed by a headshot, and another time S1 S2 followed by overkill exterm with beatdowns and backsmacks.
Another of my best moves was on guardian, when running from blue to yellow (g.ayjump) and there's a little hiding ledge on the left side. I jumped noshield into that ledge and popped out to embarrass the charging noob who jumped to yellow.
Ah yes. And I once jumped S3 S4 on guardian to get onto top mid in a 1v1. It was fun to kill him from above without him noticing me.
In multiteam I once managed to pull off like a dozen of perfect ninja backsmaks. That was hillarious.