Luigi (SSBB)/Forward smash
A knifehand thrust. It's a very fast smash attack, coming out at frame 12. It's very powerful as well, able to KO below 100% reliably. The move can be angled which alters the move's damage and knockback angle. The up angled version is especially effective since it's not only the strongest but it also has much lower ending lag than the other angles (with an FAF of 29 as opposed to 42). This gives the up angled version the shortest total duration out of any smash attack in the game; making it very safe to use.