Lost's third season ender may have left you with more questions than answers. But as experienced in debunking as we are here at Popular Mechanics, the ABC drama's theories of time travel, alternate universes, smoke monsters and invisible men are pure science fiction. What we can offer is a reality check: Writer, filmmaker, military adventurer and former dynamite wrangler Robert Young Pelton weighs in on the good, the bad and the fake from Wednesday's mind-bending finale. (If you have not seen the two-hour episode, stop reading now!)
1. Is it possible to ignite dynamite with a gunshot?
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2. Would a grenade really work under water?
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3. Can you really break someone's neck with your legs?
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4. Would Rousseau's radio transmission really have blocked the sat phone's signal?
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Source: Popular Mechanics