That's unfortunate! I find you have to run pretty hard for it to occur, and it doesn't always happen, but I get it. It's a subtle effect. I think one of the mos

That's unfortunate! I find you have to run pretty hard for it to occur, and it doesn't always happen, but I get it. It's a subtle effect. I think one of the most reliable ways to get this feeling is to hike up a mountain, then take off your backpack and lie down. :-)