Pulling up his Bermudas, Ron unwound Harry's hand from Severus', placing it on the mark of his thigh, uncaring of the blood on his best friend's hand. He then reached for Hermione's hip, who wormed her hand under Harry's shirt. Sorting themselves out, they all touched the large lighting bolt on their professor's chest. That seemed to create a feedback loop where they fed energy into Severus" body while he eased off some of his pain into theirs. It was not unbearable, but bloody hell that hurt!