Massive Spanner
The Football Wrench
Also, I've just realised how hilarious it'll be when Jon Snow gets stabbed. It didn't do that much for me in the books as I'm pretty sure he'll be back, but the non-readers won't know that. All they're gonna see is another Stark getting fecked over for trying to do the right thing, another meltdown hopefully.
Yeah, in the books you don't really see as much of the "he/she is dead, nah only joking I've introduced them again 500 pages later and they're alive", which Martin has become overly privy to and thus by now most book readers are pretty much agreed that Jon will return.