Can't think of any terribly dangerous things, here's three...
1) My cousin and I wandering the hilly mountains around Fagernes, Norway and crossing private property and what not to get to the top.
2) Stopping on the side of a street in Puerto Rico to ask directions to a hotel. The person didn't know english. After we doubled back we saw him involved in what looked like a drug deal.
3) Just a few weeks ago I was in Block Island, R.I. My girlfriend was sick so I decided to set out for a good long walk at 5 p.m. - planning to be back by 8 p.m. I walked out to the western coast but underestimated distance and time. I was walking back in pitch black and using the light house for direction. No sidewalks and no streetlights - so I had to duck out of the way into the bushes for the 2-3 that drove by me.