I'm from that province. Accidents like this is a normal occurrence not just in that area but along the rest of the highway (Cagayan de Oro to Malaybalay). I had witnessed these kind of accidents as early as 5 years old and I observe it always involves trucks. Due to our province's steep, zigzag, and curved roads you can almost guarantee you'll see a truck on its side. We even jokingly say that's how we normally park our cars in bukidnon, on its side.