Cabin fever is an idiomatic term for a claustrophobic reaction that takes place when a person or group is isolated and/or shut in, in a small space, with nothing to do, for an extended period (as in a simple country vacation cottage during a long rain or snow). Symptoms include restlessness, irritability, forgetfulness, laughter, and excessive sleeping, distrust of anyone they are with, and an urge to go outside even in the (less miserable) rain, snow or dark.--from,--I can't believe I'm using it-Wikipedia. (Yes, I'm a snob--you've not noticed?)Laughter?
[Simpson's episode "Mountain of Madness" via wikimedia; cabin fever feet by D. Sharon Pruitt/Pink Sherbet Photography Free For All Creative Commons]