The Double 1911 is something I've talked about before, and it is pretty much a novelty. Jerry Miculek took these handguns to whole new level by dual wielding them. That is the equivalent fire power to four 1911's. Check out the vid:
Damn that looked pretty bad ass in slow-mo. I still think this handgun is in no way practical, but if you bring one to the range, you are pretty much guaranteed to get everyone's attention.