What Lies Beyond... The Beginning (2014) online

While on an ecology research trip, 8 diverse college students and a witty chaperone must decide whether to fight for their lives OR fight to escape, when suddenly all hell breaks loose. Some have a hidden agenda and connections with their past, while others are bold enough to do the unthinkable. This results in a dramatic, fast-paced, extremely humorous but bloody thrill ride, which ultimately leads to the revelation of a twist(s) so sick, you shall never recover.