Few things. Was boogie boarding at the beach and had a dolphin playing in the surf probably no more than 40 feet away... pretty close when you consider they can kill sharks much larger than themselves...
Got withen 50 yards of a moose while in a national park (dumb idea in hindsight...)
Had a gila monster in my driveway (nasty little bastard)
Was jogging and came around a corner to come face to face, literately less than 10 feet from what I thought was a german sheperd at first, until I realized there was no leash attached, it was lighter in color and had a different shaped head and tail... It was a LARGE coyote. I think we were equally scared of one another because after staring at eachother for a few seconds, it turned and ran away.
Just the other day I walked down the block to get the mail, turned around to head back to the house and at the corner between me and my house was another coyote. Not as big as the first one, but still... pretty nervewracking considering my son will often open the front door and step out to talk to me when I'm getting the mail... Thankfully he didn't that night. I'm not sure how my dog would have reacted to the coyote. As I walked back toward the house, the coyote ran back up the street and into the 'nature preserve/hillside' between the two house at the end of the street.