User blog comment:Xilinoc/Ch. 785 - Bullet Bill Luffy/@comment-2226235-20150507145930/@comment-3203286-20150507150419

Awa, me and Kuro decided that it means 20 minutes have passed since the 1 hour time limit thing began. It doesn't make sense without context, but that's the only explanation that makes sense that isn't "this fight stayed paused for 20 minutes while we wait for Riku to find a mic".