of course, there's always
C-x C-c
and
M-x kill-emacs
and
M-x save-buffers-kill-emacs
also, M-!, followed by the "kill" shell command, above.
or, M-x shell, and again, use the aforementioned shell command, this time in the shell buffer that you just created.
But wouldn't you rather settle down to a nice game of M-x tetris?