And now you can jump in water! Or deadly acid, dark bubbles, liquid filthogen.. so on, whatever deadly ocean surrounds us, doesn't kill us instantly, but over time [DoT = Damage over Time]. This example is set up to kill pretty fast..
All pools of liquid will be deadly, I guess.. and you better stay out. Which makes wall jumping [especially tier 3, infinite wall jump] more useful now, since you can recover from any fall and get back on dry land no matter how high the climb.
If you are fast enough.