Fast Lap (lap 5) begins at frame 7255. Recommend starting at 7000. For reference, An unassisted record (WR I believe) by edward406 is 22"31, so at least I'm doing something right this time by having my TAS beat "a mere human," unlike my Maximum Velocity attempt.
26"30 - 23"58 - 23"59 - 23"63 - 22"06 = 1'59"16
Bad opener (WR is 25"36). The goal of this TAS wasn't a fast total, but a fast lap.
Speaking of which, if I was able to match the WR opener with Expert CPU rather than Practice Golden Fox CPU, I'd beat the unassisted WR for the five lap time, despite it not being the primary goal.
Let's see... Trick the timer to tick "01 rather than "02 for the first frame of the lap, edge out every sub-pixel I can entering the lap, abuse the rail to brake even faster, abuse the fact my accelerator is useless for maintaining boosted speed but useful for dealing with my momentum's direction, and realize the "dirt" doesn't slow me down worse than normal roadway (but somehow doesn't let me accelerate on it even boosted).
Made a start on Big Blue, trying out a mediocre opener. Expert doesn't look like it'll cut it for five lap times. Verification movie for Master it is.