The mid-week Climax Series games are played well past my bedtime (if anyone has a justin.tv archive link, please do share), but I am following along asynchronously as usual.
Nippon Ham won Game 1 of the second stage of the Pacific League's Climax Series on a walk-off grand slam hit by Termel Sledge. Deanna live-blogged it and a clip is available on YouTube.
I can't hear about a walk-off grand slam without recalling Kintetsu's 2001 Pacific League clincher, which is my favorite walk-off of all time. How many other big games have been won on a walk-off grand slam?