Ex Firefighter Calls Show Scariest Thing Hes Ever Done. Some reality shows are just harder than others. Take Darkness, the new offering from Discovery that premieres Wednesday night. The show puts three participants into separate sections of a labyrinth of caves and challenges them to find each other  and the way out. Heres the catch Contestants cant see a thing they are filmed with infrared cameras that emit no light visible to the human eye. On Wednesdays episode, the survivalists face snakes, claustrophobia and treacherous paths. One of them even has to cross a frigid underground river. Hypothermia is always a concern since the caves are generally around 5. Farenheit, which gets much colder when youre wet. Its like weve known each other our whole lives, says Jeff Tucker, a survivalist on the premiere episode. We became very close out there. You become close with people when youre literally depending on them for your life. Discovery Channel. Tucker has had an eventful life before appearing on Darkness. Hes a former firefighter and bomb investigator who has had more than his share of extreme adventures. Follow Investigation Discovery On Instagram On Investigation Discovery Watch Full Episodes Of Investigation Discovery Series Get The Latest Follow CrimeFeed On. Some reality shows are just harder than others. Take Darkness, the new offering from Discovery that premieres Wednesday night. The show puts three. Scary As Shit Movies You Can Watch On Netflix At least youll have some great movies to watch when you cant sleep. Estimates suggest that as many as one in six patients suffers from claustrophobia in an MRI machine and cant go through with it one study found that 16. Watch Claustrophobia Online Claustrophobia Full Movie Online' title='Watch Claustrophobia Online Claustrophobia Full Movie Online' />Online version of the daily newspaper. Includes headlines, polls, articles, analysis, commentaries and weather updates. Watch Claustrophobia Online Claustrophobia Full Movie Online' title='Watch Claustrophobia Online Claustrophobia Full Movie Online' />Still, tells PEOPLE that Darkness was one of the most intense experiences of his life. During one harrowing moment on the premiere episode, one of Tuckers partners falls down an embankment. Directed by Pter Engert. With C. J. Thomason, Monica Keena, Edward Furlong, Andre Royo. Thanks to a devastating nuclear war, a group of people find themselves. After a movie theater shooting that left at least 12 dead and 58 wounded, witnesses described a scene of claustrophobia, panic and blood. Tucker hasnt seen the episode yet, but PEOPLE has  and its terrifying. It just took me back to some things in my past, says Tucker, his voice still cracking at the memory. It was one of the scariest things Id ever done. Watch 4Antastic Force Online Hollywoodreporter. The special two night premiere of Darkness airs Wednesday and Thursday at 9 p. ET on the Discovery Channel.