This one left a mark.

Following a bike crash along the Tom Blake Bike Trail in Snowmass Village, Colo., on Wednesday, Lance Armstrong shared the bloody aftermath on Instagram.

“Well, sometimes you’re the hammer and sometimes you’re the nail! The Tom Blake trail (one of my faves) came up and tried to KO my ass today,” the cyclist wrote. “Took quite the blow to the noggin’ so swung by the Aspen Valley Hospital (great facility!) to get my head checked.”

Armstrong also revealed he would have never stepped foot into a hospital had the accident taken place years ago.

“For the 46 yrs prior to today I completely would have blown off getting checked. Not now,” he penned, adding he had been examined by emergency room doctor.

In April, Armstrong managed to reach a $5 million settlement in a $100 million fraud lawsuit.