After reading Kevin G's recommendation not to overdo the edible, I tried some more chocolate (1/4 of a square of 25mg) and had a much more pleasant experience. Here I was going up when I needed to cut back.
One thing I really find quite surprising with this stuff is how long it stays with you. For me, I started feeling the effects at about an hour and fifteen minutes in, and then they kept growing and stayed with me for hours.
