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Witness freak encounters, unexpected assaults and killer animal instincts -- these are the world's weirdest sneak attacks. In South Africa, a cyclist is suddenly slammed by an antelope traveling at 30 mph. In North Carolina, a 250-lb gator wanders into a highway ditch and the relocation efforts are disastrous. Other encounters include a 24-foot-long anaconda loose in a town and a man who discovers how agonizing it can be to have a fish burrow into your urethra.