Something yanked a tripod from her pocket!

Remember when the flashlight was tugged out of my hand going up the steps to the 2nd floor, long long time ago? Well my iPhone tri-pod was tugged out of my jacket pocket last night & landed about 2/3 ft away after bouncing off a stud (no wall, just studs). It was IN my pocket! I was standing still & had been for approx 5 min. or more. Meri even saw it fly out of my pocket. Tried to "recreate" several different ways, no go! If it had "fallen/dropped" out of my pocket it would/should have landed next to my foot, not a few feet away. That place never disappoints as far as the spirits. This happened on the 2nd floor in the front bedroom.