occasional as in once a year or so when I am haveing a bowel movement ,for instance this morning I had a bowel movement ,then felt I wasn't done, I started feeling dread because I knew I was in trouble when I felt all my blood drain to my toes I start gasping for breath I get clammy , nausetated, just feel like I could die. I knew i still had to pass more stool but until the spell passed I had no desire to push until it had passed then I had the desire to push again, I feel weak following and get very pale during these episodes