I had a very quick and fast oncoming GB attack between my Flush #2 and #3. This attack was unlike any other attacks. I had eaten nearly no fat or any of the wrong foods that day or the day before and it came on very fast, within half an hour and with much more pain.
I took a drink of ES (1tbsp ES, 3/4 water) and it gave me immediate relief, then the next morning I had diarrhea for about 6 hours. It was well worth the pain relief.