Shit son, my buddy thought he lost one of the seeds I gave him in his dirt somewhere and possibly planted another seed into the same spot, and the weird growth coming out of his dirt might be another seed, but what you're describing with the tap root sticking out sounds more accurate. Thats kinda funny I've never seen that, what the hell kinda plant doesn't know how to grow down into the dirt? Perhaps I gave him the wrong couple of seeds... I'll try to get some pics too from him.