It does sound alot, but it's not unheard of for some very experienced hardcore users. A friend of mine, although he hadn't had acid for years prior, he managed to secure himself a sheet of supermen, which weren't too bad strength wise. Anyway he took at least five at a time, once or twice a day!! If that sounds bad wait till you hear what he did while tripping.
He had just purchased a rocky hillside, covered with boulders, smaller rocks, dead trees and scrub, and millions of pebbles. He spent his dayz alone, lifting and moving rocks. From sunup -chew - to sundown, he lifted, sorted, built and arranged. By the time he'd finished the sheet he had literally picked up almost every stone on the property. His 20c sized pebbles were arranged in a wall, and he built a swimming pool among a bunch of unmovable boulders.
So how did the acid go? Not too good really. Towards the end of the sheet, he complained of lightning bolts hitting him in the forearms. He knew they weren't really occurring, but the pain was real and he got a visual blast of light that accompanied them. Figuring he needed a break, he gave himself a week off before gobbling up the remaining sheet with a few old remnants of other trips thrown in. Not only did he get the lightening strikes, but he got into a serious loop and struggled for some time before he recovered. He said each lightening strike would restart the loop. AFAIK he hasn't taken acid since.
