Underwater begins like Poseidon Adventure meets Gravity, but without any of the flair those two have. Underwater is incredibly vanilla. I appreciate that we jump right into the action and shove everything into 90 minutes, but we really need some context for something. We really only have a vague idea of who these people are, what they are doing, and why any of this is happening. We keep hearing about the company that they work for, but we never learn anything about it. Nothing is fleshed out and I was begging for anything to anchor the story or the characters. It's an okay looking movie and there are some plot points I wasn't expecting, but everything else is bland; especially Kristen Stewart. I've yet to find a film where the praise she keeps getting is validated. I've only seen her play varying degrees of monotone, angsty Kristen Stewart. Sure, sometimes she stutters here, but I never got any emotion from her. The rest of the cast is okay, minus TJ Miller who really has no business being in movies at all. If you are one of those people who really enjoys big, dumb Hollywood movies, I'm not sure Underwater has enough going on to hold you attention, even for 90 minutes. If you are more interested in the technical aspects, story, or performances, you'll probably be underwhelmed. I was concerned to see the 90 minute run time (what non-comedy story can you tell effectively that fast), but it is both the biggest strength and weakness of the film. We start running within the first five minutes, but I wanted more about why we are running.