Yeah, if the main cola breaks you can still put it into flower, the growth hormone auxin will be redistributed from the main growth point into the other growth points. "Topping" is taking advantage of this. If the break is fresh, you can mend it together and hold it with sports tape or even super glue. I did this the other day and was able to reattach within about 45 seconds of the break and it did not slow her down at all.