Well, when I got home I realized that I burnt around 2 and a half quarts of oil. It was knocking really loud when revved above 2 grand. But I had also realized that it had been leaking from the head cover. I drove it to a restaurant in town and back home. When I checked my oil, I burned about a quart. I thought it was ridiculous. I thought that the knocking/clicking noise may have been a lifter that went bad at first, but the next day I realized that I had oil coming out of the back of my exhaust. The only thing I can think of is that when I was driving it, I may have bent a valve and that the knocking is from it running with low oil for about a mile or two to get it home.