These things have gone from funny to angry and vindictive. In particular, that overpass-falling one strikes me as an easy mistake. Here in Raleigh, we just had two people do something very similar: an overpass (near the Crabtree area, for locals) looks for all the world like it's a single bridge. But in reality, each lane is its own structure, with about four to six feet between the two that drops straight down to the freeway below. I'd driven by a hundred times and had no idea, and while yes, I'd like to think I'd look before I leaped over, I could easily see paying more attention to traffic than the divider itself and making the same mistake.
That entry happened, according to the site, in Florida, so it's a different area. But there's certainly not enough information there to make a judgment call on his intelligence.