Riff saw what happened when the sword connected with the can. He didn't understand the full reason why the sword had reacted the way it did, not yet but he would get enough information to forum a conjecture soon enough, but it was solid proof that the sword couldn't be a normal item. One of Labukas or Nelabasis' items however...
Riff's smile widened, gaining a questionable edge to it.
"Now then, do you want to come up with an excuse of how you're only borrowing the man's sword? Or maybe that you found that sword and just happened to pick it up?"