Some people just like to hear themselves talk. I was spinning an argon bottle out to the bottle corral and boss asks me; "Out of gas?" Ummm, no. I have a ballroom dance competition coming up and I can't find a suitable practice partner. . . .
A favorite of mine is when someone approaches me, who is always coddling their phone otherwise, asking me if Home Depot etc carries something, and then asks me what it costs, as if I carry inventory/price sheets in my pockets.