You decide to take the knife. One too many shadowy objects has your nerves on edge. The storm swells all around you and Xavier as you walk briskly back towards the party. You don’t walk more briskly than the speed of light though. And that’s a bummer for you, because lightning goes that fast, and also loves metal objects, like the knife in your hand. Sure, the odds of your getting hit by lightning were low, (still better odds than the lottery though), but you just hit the jackpot.