my friend and I were shooting pool at his home early in the morning, I belive it was a friday or saterday morning. when we heared a low rumble and a slight shaking sensation (LFO low frequence osalation) it kinda made us sick, upset stomach ect.. he lives high on a mountian over looking the valley and several farms. we looked for a helocopter but did not see any, then he looked up and saw a triangle shaped object, nudging me to look up we watched it move slowly twards Williamsport in a south or south east direction. a couple other people in the valley saw it also. we never discusted it with any one.