Joined a game right as it was starting on Dam. The first images are me as an invisible monster with extremely low hp. I was unable to Jump/Climb, and could only smell. AI Goliath was still on the field wrecking havoc (he even downed some people at stage 1 lol). I was eventually killed, and allowed to jump in as Goliath. I had no hud, but could still use my smell ability.
Interesting notes: Was apparently 760m away from the Megamouth when the hunters killed it. Was confined in the dome. Took damage, but seemed to be reduced. Was in first person (or so I assume) the entire time as the invisible monster.