sunday dec 6 ride put me in the hospital

we put 190 KM loop in slick icy roads and un tracked snow trails. 4 inches
of crunchey snow, son #1 was leading and I was following. WOT with a little
back off to make the corner and back to WOT, 4WD and snow flying every where. no misshaps except the polaris broke an axel . the next day my chest
was sore , Tuesday I go to ER and no it,s not a hart attack. xrays, CT scan
and ultra sound . 7 hrs on the ER bed and doc comes back and said I was being admitted, blood clot in my lung and one in my right leg right where the inside of your leg cotacts the seat edge. we figured out what happened. the polaris has a wider wheel track and my Rincon is narrower. my machine was darting left and right like the cutter bar on the old sickle mower. I was squeezing the seat hard with my legs . my leg is not bruised and feels fine.
when I was a kid, I use to think 45 was an old man. that’s my son,s age now.
I guess I,ll know better next time.