My dog Winnie just got herself on my chest and able to put paws on keyboard. After marking many email messages as "read" or "killed" (I don't even know what Killed state would do in my Gnus setup) she was able to get type M-x (without opposable thumbs, even, and type):

   M-x nbbbbbbbbbiuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

At which point I pulled her paws off the keyboard and hit C-a C-k to save the Emacs function she was trying to execute. It seemed there were more u's to come, so I don't suppose that's the proper name quoted above.

I'm thinking of writing an interactive command for her, but what would it do? Serve her kibble? (She was waiting for dinner when she did this).