Right? It looks weird. I wasn't even sure it was a mushroom until i trespassed on the old man's yard to find out

The weirdest part is you see how porous the gills look? Each one of those pore looking bits is an individual filament that seems to make up the "gills" on the underside. Im only used to portabello and shiitake mushrooms in the kitchen and the gills on those are very different