Weather elements. Gale-force winds so strong it effects how we move and gravitate (Changes the physics by blowing us around). Terrential downpours so hard they inhibit our ability to move/catapult vertically. Sand storms (Like on Mars) so bad the path of progression is barely visible. Tornados so violent that we have to rapidly press a button to get out or avoid them entirely or we die. Hail storms so un-relentlingly brutal it gradually kills us if we don't find shelter momentarily.