A 47-year-old British man with only five weeks of previous athletic training has just completed running 43 marathons in 51 days. For seven weeks he's done at least 27 miles a day for six days a week, over 1,110 miles total.
No joke -- it's comedian Eddie Izzard, running for charity.
He did have the help of Olympic experts, and he's got blisters on top of blisters, but still -- it is truly amazing what potential lies within each and every "ordinary" human being.