>>102219062To get extra blood splatters I suppose. Simply getting hit by a train is fatal already and there is usually a lot of blood and gore anyway.
Rule of cool I guess. Even though that's a complete nonsense, there isn't a space there to put the blade, and the blade is way too large to actually do anything. It needs to have large tangent speed to cut and with large diameter that just won't happen. Plus such blades are terrible at cutting flesh. It just gets stuck everywhere, jamming the blade.
