Do this: hold one hand, hand 1, very still, and slap it with your other hand, hand 2. Hand 2 was moving in relation to Hand 1, which, technically, means that,according to the theory of relativity, time was moving very very very very very very very slightly more slowly in the vicinity of Hand 2. This means that Hand 1 was meeting an earlier version of part of yourself when Hand2 bumped into it. In theory, anyway.
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webbtwh commented on :
thanks dudes