Whoohoo! Easy fix!
Sounds like my easy fix today after 4.5 really hard sessions. Car decided to blow a 3" tear into the top rad hose and blow coolant out like a geyser all over the windsheild at full tilt rounding a bend. Ran over to Autozone and put another hose on it, runs just fine. Phew.
That is 2 coolant explosions at that track this year. 1st a freeze plug and now this. I hope its coincedence and nothing more serious.