cig- i experience the same thing altho i wouldn't call it a "brick" - more like a "pebble" - i generally get that sensation in late afternoon not in the mornings after pooping two to four times (thanks to mag, time, diet, etc) - recently was examined by a gastro who found nothing and am having my first colonoscopy in two weeks - but he went right up there and felt nothing. generally, in the late afternoons, i discover through manual examination (my own, fingercot, prep H cream, etc) that there is indeed a "pebble" or two of poop up there that i have to manually extract. i'm thinking this is because of the mag and flax oil etc that i take. that is, lot of poop going on. ha ha ha. good luck, g-