I was walking back to Hove (was actually most of the way back along the seafront) after a student night out in West Street, when I heard the bomb go off.
I actually remember the Hinshelwood one, on that video, being much much slower in real life. Actual slow motion as we watched from the family stand, yelling (also in slow motion) "Noooooooooooooooo"
There were plenty of police with dogs, looking a bit mean, the evening we arrived for the conference in Olomouc in April. Didn't look like they would be overly tolerant.