i always seem to sense them several seconds before whoever im with,their always like ,whatever,and then oh crap,seem to hear a slight rumble before the shaking starts,last time i was in a 12 story building,restraunt upstairs was tossin dishs off the tables,down stairs just a slight side to side.you should have seen the bust boys flyin down the stairsbut seriously,this crap feels weird as hell and get a little scarry depending wher your at.your best not to do thisyou feel more like thisbest thing to just get away from windows and giant chandeliers ,tall buildings,fish tanks.if your lucky your out in open fields and you can see the ground just rolling like the ocean.