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Since DS had no chance to return the favor financially because he was, relatively speaking, a poor college student, he did return a small favor to the aforementioned roomate at one time.</p>
<p>Being fully aware that his roommate might not get up in time for his final, DS rushed back to their shared dorm room between classes to wake him up. Initially he still did not want to go to the final even after DS had waken him up. (The reason is complicated and I do not want to go into details.) DS insisted that he got out of his bed and took the final. DS knew that it would likely delay his graduation for one semester if he did not have that credit (which he could get if only he was willing to go take the final.) He did go take the final and easily got the credit. (His roommate is very smart. He often could write an essay in one evening while most students might labor on the same essy for a week and the quality of their essays may not be better than his. He completed his senior project almost a year before graduation while many literally completed it at the last minute, e.g., like DS 
Many who do not know him well, like one girl who was his gf, on and off for a short time, and who most of the roommates think she really does not appreciate him, may even think he lacks “ambition.”)</p>