Two months ago went down the 1/2 mile driveway too fast on ATV, rolled it. Landed on the asphalt with head and elbow and hip getting whacked hard. Was on 2 blood thinners at the time. Checked myself--no long bone fractures, no internal injuries--other than I knew I was llikely gonna get a bleed inside my head. Pushed the ATV back on its wheels and off the driveway, walked back to house, called a friend to come bandage me up. Really sick that night with headache, nausea, weakness--too sick to call for help, really. Better the next day. After 10 days, the Headache got bad enough that I went in for CT scan--fair sized subdural hematoma (blood clot on brain). Neuro-surgeon said if its been 10 days and you're still walking and talking and thinking, wait another week or two and it will likely resolve--it did. Completely back to nurmal.