Context : Aliens by J. Cameronmirx said:...more examples...
Subtle mixture of irony and skepticism.Ripley : Hi. I feel like a kind of fifth wheel around here. Is there anything I can do?
(Sergeant) Apone : I don't know. Is there anything you can do?
Ripley: Well, I can drive that loader. I have a Class 2 rating.
(Apone & Hicks exchange a skeptical glance, considering).
Apone: Be my guest.
Context : Aliens by J. Cameron
Subtle mixture of irony and skepticism.
Basically, I think of be my guest as an emphasized please do.