The first time I did that, I thought it was cool. The several times I've done it since, I just thought about having to replace another arrow (or two). With carbons, it's the money. With cedars, it's the time to build them that bothers me.
I think it would take forever to do one on purpose (even Byron Ferguson had to make lots of attempts). I seem to be pretty gifted (or cursed) at doing it accidentally. I just can't make myself shoot at separate dots. I love to see a nice tight group, so that's the price you pay I guess.
Congrats on your first! That's the fun one.