And from West Campus, the way to get to the closest bridge to take you north of the gorge is a little muddy/wooden path down the side of it. Combine that with drinking and bad weather and probability is going to express itself. Come to think of it, how am I still alive?
Edit: And to add more to his point, the freshmen are pretty much all on North Campus now, the non-freshmen still in dorms on West, and everyone not in dorms south of the campus. But a lot of frats are also still on West Campus, meaning the same path is commonly taken in the other direction for freshmen to get to those. And even ignoring frats altogether, still a number of gorge crossings needed to get to various things. The main bridges more near the quad/building part of campus are usually safer, but then there's a handful of other ones over each gorge that will be usually the one someones takes unless it's the middle of the day and they're going to/from class.