Ok this may sound insane but trangle cut sandwiches definitely taste different than square cut. 3 holed donuts obviously won’t but at least with sandwitches it changes how much of the crust vs everything else you taste.

My understanding is that leaves contain some compound(s) that, when wet and under the extremely high pressures that train wheels provide, becomes one of the most effective lubricants we know about. In other words, the brakes literally won’t do anything because you’ll slip-n-slide your way at the same speed you were going before.