Right, since some one of you asked...here's the pics of the damage to my Civic. Seems my dad doesn't mind me sharing as much as I thought he might. :-P
So yeah, pretty much as I described it. Bumper doesn't look THAT bad in the picture, outside of the fact it could easily stab somebody in the leg now as they walk by. And I guess there are scratches on the headlamp that I didn't notice during my initial assessment.
Handed back the Sentra to my dad, and currently driving the rental car assigned to me, which is a Chevy Cruze. Can't say I'm too keen on it yet, although the drive's pretty smooth. Not that it really matters, I should only have it for two days.