It is also possible to fight using your own fists: Ah, I didn't know this. Good to know :)
Do you have the info appear when you grab a handle? : Not that I recall, but that would be a good option.
One more thing I wanted to mention: there is one large robot that has lightning in front and a handle on its back (that you have to pull to kill it). I think this robot is super cool, as you have to try to find a way to approach him from behind. However, once I had this robot become stuck in a narrow hallway, and he was blocking the path. I couldn't continue but by going through him, since that robot can't be damaged by weapons (I think).