"Claustrophobic tension" refers to a feeling of intense discomfort or anxiety that arises in situations where one feels confined or trapped in a small or restricted space. Full definition
It's a shame, because director Alister Grierson and cinematographer Jules O'Loughlin create a template of claustrophobic tension throughout much of the multitude of exploration sequences (Even, dare I say, with the aid of 3 - D in certain moments, where the depth of rocks and ledges registers a bit more, though for every successful, stereoscopic medium shot, there are at least two phony - looking wide shots that ruin the illusion). (markreviewsmovies.com)
The Dolby Digital 5.1 EX and DTS 6.1 ES mixes are both unrelenting in suffocating the viewer in claustrophobic tension. (bbc.co.uk)
The gritty visuals mostly liberate the material from its confined roots as a stage play, while still deriving claustrophobic tension. (cinemalogue.com)