The highest I've ever been was after eating some pot cookies made with my buddy's awesome homegrown. He gave me two cookies but told me one should do it. Like an idiot, 15 minutes after eating the first one I didn't feel anything so I ate the second. An hour later I knew one would have done the trick very nicely. I had never thought I could get too high but this was pretty close. About 6 hours later my old girlfriend came by, took one look at me, and said "you're so fucking stoned!!" I was still high when I went to bed that night and even felt a bit out of it the next day.