In the 8th grade, Marshall broke his leg during a football game he was playing with friends and spent the better part of the year being homeschooled while he recuperated, first at Children's Hospital of Los Angeles, and later at home where he spent several months in a full body cast. Marshall later credited this period in his life for preparing him for musical study, as the forced inactivity calmed down his naturally hyperactive personality thus giving him the focus and patience he would need in order to develop as a musician.