Some time ago we have described TimeControl technique which allows to fine-tune animation timing without quality loss, and now we have applied that technique to shot 20 to get SlowMo effect.
Download ogg-video: slowmo.ogv.
You can examine animation sources here. Animation have complex structure and splitted into parts – each character in separate file. All parts have normal timing and composed together in the 20-3.sif file (you see it in the first part of the video). SlowMo effect is applied in 20.sif file by importing 20-3.sif into it and changing the TimeOffset property.