TheStreet's Jim Cramer shares his thoughts on a new Goldman Sachs report by an analyst who said oil is heading to $75 a barrel, compared to its current level of just over $80. Yet, this same analyst once said oil was going to $150 a barrel, causing quite a stir. According to Cramer, $75 in oil prices makes people think the oil driller stocks are in for a steep decline. Cramer says if the drillers start to drop in price, this might be a significant buying opportunity. However, for right now, Cramer says, "let it rain" as the oil market says the Goldman Sachs analyst will be right. Oil prices have been on the decline lately, adding to fears of deflation, or falling prices.