I know it's impossible to move faster than light, this is merely hypothetical.
When you move faster than light, you have infinite mass. Now, surely if that thing with infinite mass crashed into anything, wouldn't an infinite force would be produced (F=MA) ?
And wouldn't that force kinda fuck shit up?
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I'm not a physicist, but momentum probably stops its increase in speed after reaching the speed of light, so P=MA is probably not universally true.