Did you ever wake up suddenly because while you were having a dream because your body actually moved a bit? This poor dog was apparently having a running dream when his body kicked in . . . such a rude awakening! What protects us from physically acting out our dreams and hurting ourselves? The body functions to paralyze itself during REM sleep to protect us from self-damage that would occur if we acted out scenes from our dreams. [Via hahahaimontheinternet]