It's possible that this isn't the driver's fault; a commenter on the video said a local paper reported that the hydraulic lift mechanism failed and raised the bed while the guy was driving, and the driver didn't know what had happened behind him. The report is in Arabic, though, so we're not sure. Not being dump truck drivers ourselves, we're also not sure how easy it should be to tell if the bed is up or down.
When we said "contribution to the genre" above, we're talking specifically about dump truck accidents: a similar, but much worse, incident happened in Ontario last year. In Canada, a drunk dump truck driver had his bed up and whacked into the overhead trusses of the high-volume Burlington Skyway bridge just before a big holiday weekend. The bridge was closed for the weekend and misery ensued for all Toronto-bound drivers. So to that Saudi guy, we say: It could be worse.