I get spasms in my muscles when I get really stoned... maybe thats what you are talking about. I've never had open eye visuals. I find it really hard to believe you can have oev with just weed. I also doubt your shit was laced with anything. You were probobly just freaking out a little, closed your eyes for a bit and though they were open, and had a little bit of the shakes. Moral of the story, slow down, you don't need to smoke that much. Plus it will kill your tolerance if you do. Once you can handle "chill" doses then up it a little. Remember... this is supposed to be a relaxing/fun/silly/moving experience not a scary spastic one. Just smoke a little less....