Spring Break...funny, you may have had a Clutch Spring Break.
I had the exact symptoms you describe on a '94 DOHC VTEC. It turned out to be a broken clutch disk spring that came out of the disk and was stuck in between the disk and plate. The jerking is from the spring getting jammed in between the moving parts etc. It can also stop you from engaging the clutch and not be able to shift out of gear, very dangerous!