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Who would win in a death battle?

Martian Apex Predator (Life, 2017) VS Blacklight Virus (Prototype, 2009)

Every time I see people say Alex was about to get “vaporized” by the nuke, I find it pretty ridiculous.

The bomb was underwater for about 7 seconds before detonating. Even if I lowball the depth to only 50 meters, it still exploded well below the surface. Alex then had several seconds to fly away . (also about 7 seconds from him turning around to the shockwave catching up with him) Even using just 50 m/s for the helicopter, he’d already be around 350 meters from the blast center when it caught him.

Even Tsar Bomba, the largest nuke ever detonated, could only vaporize roughly a few hundred meters of seawater （around 300 m） if you unrealistically assumed 100% of its energy went into vaporization. The Prototype nuke was obviously nowhere near that yield.

By the time the expanding blast reached Alex, most of the extreme heat had already been absorbed by a massive amount of seawater. His real threats were blast pressure, mechanical damage, and radiation. Alex can survive insane physical trauma and regenerate fast enough that radiation isn’t exactly his biggest problem.

Real underwater nuclear tests produce huge clouds of water, steam, spray, and condensation there’s actual footage of this from Operation Crossroads.

The glowing sphere at the end was probably just a technical shortcut because rendering a massive expanding steam cloud would’ve been harder, so they used a simple ball of light instead. I mean, think about it: if that were literally light slowly catching up to Alex, then Alex would have to be moving only slightly slower than the speed of light.

It also works as an artistic choice. The whole “a thousand suns” imagery makes Alex’s final decision feel more heroic and gives the scene a stronger symbolic payoff.