Recently dosed my first dose of 2C-I, now I eyeballed it so I have no way of knowing how much I had, but at a guess it was 25mgs. I experienced full body load, projectile vomiting and just stiff legs and arms.
Never eyeball your dosage. You might have had any amount of 2C-I, rather than your guess of 25mg. I recently found a perfectly good milligram scale on Amazon for $30... time to invest.