Any SWEPs that make your person just have their arms down?

Kind of like the key thing in dark rp, where your guy can just walk without one of their arms raised or something like that. I’m trying to make a movie and it’s really hard without this.
Also is there a walking command that can make you just walk?

Is that what you are looking for?

There is a Keys weapon in RP. You could use that. The machinima one is good too. I’d go with either.