Clarification on Critical Strikes.
I'm here asking for some clarification with critical strikes. Besides adc (with crit, and ashe obvi) I've noticed I can crit on certain AP champs such as gragas. Is a critical strike anything that might cause double normal damage? In the specific case with Gragas I was pure AP and apparently crit for 783 from his w. If my assumption is correct about the double damage classifying it as a crit than I believe I understand it. If not, could someone shed some light please?