Maybe I am totally mixing up route names, but I know I've been on that route (5.8, I believe) with the heel hook and if you fall as a second you're going to have a hell of a time getting back on. Someone help me, then, what is the route?
I thought you were guessing about cfrac's second route (the toproping one with the overhangs) when you said Modern Times.
But cfrac's heel hook photo is also not Modern Times, which I know because I'm the one in the pic. I found it significantly tougher than MT.
It does sound, however, like you are thinking of Modern Times from your description. It's just that the pic is not Modern Times.