Well, posted for the two who did post. First actual Critical of the game (getting within the range or a Critical Success, which starts at 0 and goes up every 10 points you get in Luck, which is how I found to make Luck useful aside from its many other uses).
Ominal got a 1 on that attack roll (on the dice) XD
Which aside from being a Critical Strike allows an extra affect. In this case, the one that made the most sense was knocking the opponent prone.