Now I remember!!!
So I was riding down a sidewalk, when all of a sudden it took a really sharp turn, and I went off the sidewalk on the grass and pumeled the back tire into the curb as I slammed on the brakes and the clutch. It felt like the back tire went up 3 feet behind me, and I thought the bike was going to flip. But it didnt and I was fine, so I kept on riding. This was back in the mid-summer, and I bet that is where the wobble comes from...!?