Left foot, center metatarsal head. I caught up with a young Marine toward the end of a VFF 3-mile run the other day where I was doing fine and minding my own business. He wanted to sprint the last half-mile, picking it up even more the last quarter-mile, and I foolishly kept up with him. He was impressed, and I was stupid. Go to jail. Go directly to jail. Do not pass go, do not collect the $200 for the x-rays, just start over in 4-8 weeks, this time remembering that you're over 40 and relearning how to run after 25 years with different muscles and connecting tissues. Arrrgh!