in this case being something like, "i tickled him to shit."
It's usage pertains to the complete and total condition of something, be it an event or an object.
I am completely afraid = dude, i'm scared TO SHIT.
My computer is completely broken = my computer short circuited TO SHIT!
Eric: "What? Why not?"
Eric subsequently raises the guitar in the air, the guitar hits the ceiling fan, and everything is BROKEN TO SHIT.