He tore both quads just trying to stand up? WTF

Story has it he spent the whole evening sitting backstage watching the rumble on the monitors. At one point he said he probably should get up to stretch but he never did. The shows finish went a wry and, because time was tight, he came sprinting from backstage, as he went to step into the ring his quads gave out.
Pretty amazing he acted like nothing happened.
The cover is heavily shopped btw.