Comebacks

So, a thought crossed your mind? Must have been a long and lonely journey.
Pardon me, but you've obviously mistaken me for someone who gives a damn. I'd like to help you out. Which way did you come in?
I'm busy now. Can I ignore you some other time?
If ignorance is bliss, you must be the happiest person alive.
I don't know what makes you so stupid, but it really works!
Have you considered suing your brains for non-support?
Don't you need a license to be that ugly?
I see the wheel is spinning, but the hamster looks dead.
If you had another brain, it would be lonely.