Bob struts in from the west.
Just like voice and such, a personalized walk message. Some people walk with a limp, others with a flare, something that might even be noticeable when hooded, if distinct enough.
As for forced messages, if your legs are damaged you would be forced to limp, hitch, hobble into the room while it heals, sort of like the wounds on your nakeds.
Maybe it has to be a pre-set list to keep spam down, kind of like the short descs? Probably don't want people "skippin' like a motherfuckin G in from the west."