Marcum contributed performances to British curator and Nashville art collector Jason Brown's 2014 and 2015 exhibitions Voices: Readings from the Brehman Collection at Ed Nash Studios, and Reinvention: A Mail Art Project at The Green Gallery in Nashville TN. Mail Yeah is a conceptual performance piece that consisted of Marcum destroying a mail box with a baseball bat while shredding emotionally charged junk mail.  Brown conferred  Reinvention: A Mail Art Project, in its entirety, to the Vanderbilt University Special Collections in 2015.