The comment was made about a gadol baTorah that "if I could give 
him my place on line (something that is not always halachically 
proper) I would do it."

     If "giving my place" means letting him in before you, though 
there are others behind you, when is it ever halachically proper, 
since it is chav la'acheirim? And if "giving my place" means 
exchanging places, giving up your place and going to the end of the 
line in his place, when is it ever halachically improper?

EMT