See some shredders pop off and bonk with the sickness as they get their kind grind on at the Chamberlin Rail Jam at Caras Park. Prelims Friday, finals Saturday, with plenty of live tunes and freshly made snow. Caras Park 5–10 PM. Free to watch the jam. The afterparty show on Friday at Monk's Bar, 225 Ryman St., features Eliot Lipp, Ebrola Syndicate and SixPoint Pros is $20-$40. Visit therailjam.com.