One of the canonical ways to execute a transition between horizontally offset targets is to: acquire and focus on the first target -> shift focus to front sight -> shoot, watch sight lift -> acquire and focus on the second target with only eyes moving -> lock upper body index and move the gun/sights in between your eyes and the second target using primarily your legs, moving the whole upper body as a unit -> shift focus to front sight -> shoot.
For people who do their transitions like this or similar, how do you execute transitions between vertically offset targets? From low to high, let's say like a failure drill. Do you do the same procedure as above, or do you keep your eyes with the front sight the whole time? Do you just move your arms at the shoulders, or do you use your lower body in some way (e.g. hips)?
The only high-to-low transitions I can think of right now are mostly artificial USPSA setups, but I'd be curious to hear about those too. That's a bit of a different can of worms it seems, because your options are limited by the fact that your sights may be blocking you from seeing the lower target. Although, maybe shooting with one eye vs both eyes open is a significant difference here.