Music at about 37:00 into the film

[Sajiky]

Anyone know what the music playing about 37 minutes in when the rednecks are parking to go hunt the "green man" is from?  It sounds familiar and it's driving me nuts.  Not sure if it sounds familiar cause I know it from somewhere else or simply cause I've watched this rifftrax several times.  Also while it isn't an amazing piece of brilliance musically, (consisting of I dunno three cords or so) it still comes across to me like something significantly beyond the abilities of whoever came up with the rest of the (for want of a better word) music in the film.