I took advantage of extended shutter speeds a lot when doing flash photography at parties and events. The difference is that aside from my flash, I had zero control of the lights/strobes in the venue, so it was always a gamble. I had a nice method, too. I never pointed the flash at my subject, I always bounced it off the wall, the ceiling, the floor, my shirt, someone else's shirt, etc... It always created the best dynamic.