It is kinda funny looking back...I think it was an Oring, may have just been Liquid CO2 (even with antisiphon, 6 chamber expansion etc.) I don't really remember, just happy that Bob took care of it. Needless to say, I bought a C/A tank right after.
Of course at the time I was 2min into the second game of my first tournament(2man). Lucky for me, one of the Refs loaned me his Bushmaster to finish the day (we took 2nd)
Now I make sure I have my backup tuned and ready to go too.