Okay, we all love the scary ones, so let's post some reaction mold pictures! Find the biggest, craziest ones you can find - and give credit where it's due, folks.
This one is a Matt Sigmon classic from ECU's halloween pour, 2006

And here's one by Pat Toups, which was freaking huge, from the Casselberry Pour this year

Here's Carl Billingsley pouring his thunderbolt at Sloss '05

And my big one from the 4th of July Pour in Asheville, last year

just kidding!