From mountain lions in Santa Monica to coyotes in Colorado, more and more wild animals are leaving the wild and winding up right in people's backyards. This week, "20/20? takes a look at why these creatures are getting too close for comfort and what might help stop them.
Vote below to tell us what wild animal you're most afraid of running into and watch "20/20: When Animals Strike Back" Friday at 10 p.m. ET.