It actually does exist....I've seen it before, as a manifestation of bead lightning. It's strange and really catches your eye, because the separate beads kind of split the bolt up. A few of them flickered about a half-second before the rest of the bolt. It is believed that bead lightning and ball lightning are connected by more than simply being lightning. The stories about the balls flying through windows and such are probably wives' tales, but I think bead and ball lightning are connected, and I will swear upon my TWCToday account that I've seen bead lightning on several occasions.