In RWBY Episode 8 Ruby's cape gets caught on... I think it was ice from Whice's dust capsule.

And one of the lines the Increadbles is famous for is "No Capes!" I just posted a monolauge about it, should be pretty obvious.

He's saying his cape isn't going to get caught on anything during a fight that will cause him to lose. Most likely I would imagine cause it's got a quick release catch on his shoulders or something but that's just guessing.