I selected 46 packages in Nautilus, and asked it to open them in gdebi.
To my horror, it spawned 46 instances of gdebi, rendering my computer
unusable for ten minutes or so as they fought for my RAM.
When they'd stopped swapping, they weren't useful anyway; the packages
were interdependent, so each instance complained of unresolvable
dependencies. I had expected this to work like `dpkg -i *.deb` in that
directory.
(I'm not sure how much of this is Nautilus' fault; perhaps it shouldn't
have let me do this?)