Not being a Dispensationalist, I’m not too worked up about the whole predicted Rapture thing. But if you’re looking for something to do…
Step 1: Procure several inflatable people, perhaps from an adult merchandise shop.
Step 2: Buy several tanks of helium.
Step 3: Fill the inflatopeople with the helium.
Step 4: Release them into the sky until you have a sky filled with ascending naked people.
Step 5: Enjoy the freakout!
For some reason, I suspect some people are already up to step 3.
Professor Mondo 
Wouldn’t the pressure cause them to become bulbous in shape? Lowest surface-area-to-volume ratio and all that?
Well, maybe the Rapture will be for fat people — I have a shot!
My favorite part about this whole thing is that the group put up a billboard in town here talking about the end of the world–right above a liquor store called “Last Chance Liquors.”
As regards to your helium idea… you sir, are a brilliant, brilliant man.
Not being a Dispensationalist
No? Pity. (I am; but I don’t expect to be going anywhere tomorrow.)
While this is probably urban legend….while her husband was driving their convertible in a semi-developed region of the Pacific Northwest, a woman got overly excited by seeing an inflatable Christ, and believing it was rapture time, fell out of her car. I suppose she was right after all.