"For every action... there is an equal.. and opposite.. reaction."
Mantis-sicle! (Captain America can sympathize.

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Ok, my source on this isn't ideal, and its made a little worse by putting it on my hdtv. So what I'm viewing is a bit pixelated, but watchable. Sound is fine.
"Maybe there's a very ordinary explanation for what happened?"
Mantis claw tip found in the wreckage! Obviously not very ordinary.
Ok, I like how they assume because the pilots are missing that its a meat eater, and therefore it has to be a Preying Mantis. Alright, I admit, I'm letting some rules of entymology to creep into my enjoyment, but I was hoping they would at least give a movie reason for it being so large and for the exoskeleton being able to support it. Usually radiation solves all problems in this area. Or did I miss the line?
The scene with the eskimos escaping is just silly! Is it supposed to look like its in fast motion? Oooo, and the mantis roars too! I've heard that roar before, but from where? The mantis puppet does look pretty cool.
This whole scene with the mantis slowly advancing on the station with the people inside oblivious to it until the last minute is probably the best horror moment in the movie. And there's the 50's damsel in distress scream! The perfect cherry on top!
Yikes, this mantis is eating a lot of people!
"If there is such a thing then why hasn't anyone seen it?"
"Well, those who have are dead."
"Here...to scale...is the Deadly Mantis.."
There's an awful lot of military clips. Is this stock footage?
I notice that they never keep the mantis on screen for too long. This does help keep the suspense, but you can see they're also doing it because the mantis moves so slowly. They're definitely making the most out of the limitations of the puppet.
And the mantis is dead.

This is my favorite shot in the flick with the dead mantis in the background with the people looking on in the foreground. Henry88 already posted the best shot in this scene, but here's another screen grab.
You know, I'm glad this was the pick this week mainly because it's a good follow-up to Varan the Unbelievable. The two are very similar in some ways. They both follow a typical monster movie formula, but mantis is far more by the numbers and therefore far weaker. The miniature work in Mantis is nowhere near the scope and detail of Varan. Mantis has made me appreciate more how well done Varan is.