Samus Combo?

[majoras.]

So I was playing brawl and noticed that to almost all characters i could do Down-Air while they are on the ground and then connect with a back-air which gave me a lot of fast kills,
and i want to know if thats something that always connects? or if its something that can be avoidable

 

[X Megadragon]

Dair-Bair combo? Sounds interesting! :D

I'll be sure to try it when I get my hands on Brawl. This combo could definitely help Samus kill since her other KO moves have been slightly nerfed since Melee.