DMX Gets Back On ATV Days After Being Hospitalized For Crash

X tells TMZ ... he felt COMPELLED to get back on his 4-wheeler just 4 days after he was released from the hospital ... despite suffering a major concussion and numerous stitches from his last ride.

X says, "S**t happens, you know what I mean. Hopefully it don't happen again ... but I am a Ruff Ryder."

It's clear from the footage (taken in front of X's South Carolina pad) ... X isn't scared to take that first joy-ride, saying "You gotta get back on that mother f-er ... try it again."