Some of those are pretty interesting. I like the last one with the tail light. I never use a flash at night, just a tripod and patience.
It's still dark here in NW Ohio but we got an incredibly beautiful snowfall over night and in fact is still snowing quite a bit. In a few minutes I'm going out for some shots.
He mentioned that he used a 6 second exposure and the flash just as a fill. The flash will stop anything it hits at 1/200th of a second (or whatever the flash speed is) but after that the shutter can remain open to expose for things that the flash has not yet hit.
thanks Larry, and ya EGproductions got it when he said the long exposure lets you still get the effect of a night shot but the flash will illuminate objects in the foreground (or wherever the flash is) and help freeze them if they are moving. In this case though i had the model stay still for the duration as i didn't want any ghosting around her.
I use off-camera wireless flashes, you won't get quite the same effect with an on-camera flash whether big or small for more info read www.strobist.blogspot.com there is so much info there it can be mind boggling so i suggest you check out Lighting 101 to start with.