In this case it was more help than harm. If they would have gone off the road at those speeds it would have a been a long fall over the side and injuries would likely have been worse. Actually, if the guard rail had not been there Jimmy would have been just fine.Guardrails scare the hell out of me. I've witnessed two dead riders due to guardrails and it's not pretty.
Best wishes to a full and speedy recovery to all!