My buddy and I were riding the bike path here in San Gabriel Valley, CA. It's a great dedicated bike path (class I) that leads from the Inland Empire to Seal Beach. It's been hot the past few days (90-100 degrees F). My friend and I encounter a man passed out in one lane of the two way bike path. He looks homeless.

Nonetheless I suggest we stop and help him. My friend says we'll ride to the next overpass and call the police; he has a bad feeling about this situation. I feel hesitant at first because if it's emergency we can help this guy then and there. But he urges us to push on to the next overpass which intersects with a major road.

He calls 911 and an ambulance comes. As the EMTs/paramedics make their way to the man, the man gets up, pulls out a machete and then runs in to the bush/riverbed.
If my friend and I had gotten up close enough to this guy, he could've attacked us. The first responders told us that this happens often: Guy will play passed out and jump up and attack and rob someone (mostly between Downey and Cerritos).

Be careful out there.