Here is a conversation I had on Twitter a little over an hour ago:
@sack_vegas there’s a (presumably) homeless guy sleeping right by the trail at the second lake dog park. Watch your pups
@xKazo Sure he is not some dead dude? Weird to have a homeless person out this way.
@sack_vegas well he was hissing at my dog
@xKazo That is wack! And creepy.
Thoughts?? Do we call and get the.cops to check him out and make sure he is O.K. and not a threat to others? Kids could be wandering around down there…
Update: The guy I was tweeting with saw the cops there later checking the situation out.
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Sack-Vegas!!!! 
Uh, I don’t have kids or dogs, but it sounds like the type of thing where having someone look in on it could be wise. If he’s hissing at dogs he sounds a little unstable. Could need assistance or potentially be a threat to the wrong person who wanders through.