By Bad Seed
Listen out at 10 seconds for the first car scrape. Then at 16 seconds for 'The Beast' (as it's affectionately known) getting wedged at the gates of The Embassy.
Onlooking Dubliners supply 'oohs and ahs' to great effect :)
The President & First Lady were moved to another car - all this happened behind the sight of the van.
See him head off here http://www.youtube.com/watch?v=EF5RQ852BPM
p.s. best to watch first 60 seconds of this vid as when the van pulls in, we don't get to see much.