Marine recruiter Sgt. Timothy Riffe competed in a pull-up challenge against University of Minnesota gymnast Justine Cherwink at TCF Bank Stadium for the Military Appreciation Football Game Sept. 10. During a time-out in the fourth quarter, Riffe and Cherwink had 30 seconds to complete as many pull-ups as possible. More than 48,800 Golden Gopher fans cheered as Cherwink knocked out 18. However, it wasn't enough to beat Riffe who completed 28. For additional imagery from the event, visit www.facebook.com/rstwincities. - Marine recruiter Sgt. Timothy Riffe competed in a pull-up challenge against University of Minnesota gymnast Justine Cherwink at TCF Bank Stadium for the Military Appreciation Football Game Sept. 10. During a time-out in the fourth quarter, Riffe and Cherwink had 30 seconds to complete as many pull-ups as possible. More than 48,800 Golden Gopher fans cheered as Cherwink knocked out 18. However, it wasn't enough to beat Riffe who completed 28. For additional imagery from the event, visit www.facebook.com/rstwincities.