If She-Hulk is carrying a dumpster, she can't be carried, correct?

This came up in a game last night, and a guy got mad at me because I said that a character carrying an object can't be carried.....

The way I understand it is that you cannot carry a fig carrying an object, but a flying fig w/ SS can carry an object and carry a fig at the same time.

You are correct sir. As per page 11 in the Indy Rulebook, under Carrying Other Characters:

A flying character can not pick up or carry a character that is holding an object...

Man I love when I'm right!