Bender's chest cavity compresses matter?

[on:]

In the Duh-Vinci Code, Bender pulls the "giant nickel" out of the drain in the fountain, puts it in his chest, then gets sucked down the drain.

The whole reason manhole covers are round, is because there's no angle you can put it at to make it fall through the hole.  Bender doesn't usually pull items out of his chest cavity that are larger than him.   

[Reply #1 on:]

He does it all the time. His chest is Hammerspace. Cartoon physics 101.

[Reply #2 on:]

I guess it just stood out more than usual because of how soon after he put it in there that he went down the drain.

[Reply #3 on:]

... His chest is Hammerspace...

     

     Same principle.
     Never mind how she hid it - how'd she lift it?