[quote=IVIasterJay]
How would an infected react to suffocation / having something cover their face? I might as well ask about drowning as well. Also, if something was in the way of where their body is regeneration, would the body regrow around the obstacle? Just thinking of some logistics of these predators' abilities.
[/quote]

If something is obstructing a bodily function, they would forcibly eject it by shifting around the body in a way as to remove the the obstruction. 

As for suffocation... As I said, they would eventually manage to remove the obstruction, whatever it is, but they may go dormant for a bit while the body works on removing it depending on how long they go without breathing. If they were chasing something when their nose and eyes were covered, they will use their ears to track down their prey while the body works on removing whatever is blocking their other senses.

For drowning... Their body would eject the intruding water from their system as they float up to the surface of the water due to their density. They can also swim, although clumsily. If there is no surface to the water (like a completely flooded room) then it will have the same effect as setting them on fire (where the fire will continuously be fueled by the regenerating skin and organs), and they will constantly remain dormant. However, they will reawaken quickly as soon as their body is freed from the water-filled environment..