This is a timelapse video from Japan of work crews repairing a 100-foot wide, 50-foot deep sinkhole in the middle of a road over the course of a week. The sinkhole was caused by the digging of a new subway tunnel some 80 feet below the surface. A week, wow, that's impressive. Of course this is Japan we're talking about so I can't say I'm surprised. If this had happened here in L.A. there's no way that would been repaired so quickly. There wouldn't even be orange cones up yet, cars would just be driving into the hole.
Hit the jump for the video.
Thanks to James C, who tried to tell me sinkholes are actually earth's feeble attempts to implode on itself. I believe that.