 Summers experienced a number of accidents and crashes during his career.During a test flight on the first dual Gloster Grebe, the aircraft spun flat to within of the ground, coming out completely stalled with full engine.In a full-power dive in the Hawker Hawfinch, a fuselage bay collapsed at about terminal-velocity speed; the anchorage for the Sutton harness was in the tail and this pulled him back and nearly broke his neck.