i asked nat to pick me up after work . i jumped up and ran to find him , and i saw the outer door standing open too . the ambush had been set by people who either did n't know what they were doing or did n't have the time or resources to do it right . i shouted , not wanting to walk down that aisle alone . joy could be learned because it was the certain effect of specific causes . `` well , at least that answers what those levels are used for . '' 