While very few IPOs exhibit the type of power that TZOO had in June of 2004, I think it's interesting to note that the second leg from 6/23/2004 - 7/1/2004 was a double in a week directly after the triple in the first leg that occured between 4/27/2004 and 6/1/2004.

The percentage gain of the second leg was almost exactly 66% of the gain in the first leg.