SuperTuxKart 1.4 - Cornfield Crossing in  

This beats Andet and Wax, and is only behind theodorepringle's magic.
When doing attempts for this run, I felt I was still discovering subtleties on how to maximize the boosts, because at this level records are not only about getting all the nitros and red skids without crash, it's also about properly timing the chains of boost.
The slow down in the barn with the risk of either being slowed too much or of going too fast, jumping and losing time, probably tripled the time required to set this time.