You got your peanutbutter on my cpu! things you can and can't use as TIM in a pinch.

So you popped off you heat sink without realizing you are out of your favorite thermal compound. Before you go running around screaming and hoping to god that your local late night electronics store is still open sit down and be stationary and quiet while you panic. You have a few options, wait until morning and go to the store, I know a whole night without your beloved box will be hard but just think of all those dreams you have been missing out on. Use your other computer, if you are on this forum you most likely at least have a different PC in another room, it probably doesn't have the bells and whistles as your main rig but it is an option. Your last and most dangerous option is to search your house and garage for the closest thing to AS5 as you can find, if you don't know where to start I wrote an entire review on crap you can use as decent thermal compound and stuff you can't.