Great Seal State Park - Back to the parking lot

Lick Run Road parking area. Out of the gate you climb a doable 0.6miles. Doable, uncomfortable for me. I have not MTB'd in 10 years. On the way back it strings together a 0.93 mile mostly down hill cruise where the hardest part is not skiding through the turns. Im in my 40s pardon the grunting. Im closing my eyes and holding on because I feel like the tires are gonna squit out from under me. Riding a barely used 2016 Stumpjumper FSR stock. New tires ordered. The high volume (3.0") low pressure (20psi max) tires feel like you are riding through sand even on the flats.