This is what I like to call the "PikaPlayer Strat". This involves you drifting in the wall in MK7's Rosalina's Ice World. Unfortunately, I only had my phone at the time, and I forgot how I did it, but I think I had around 10 coins and I continued my drift until I glitched through the floor. I used Wiggler in the Tiny Tug (I think that's what it's called) with the Monster wheels. I forgot which glider, though. This glitch was discovered by myself accidentally during a 150cc Grand Prix. Hopefully someone will replicate this in Time Trials! (Please acknowledge the fact that I submitted this)

Please reply as I want this glitch to be used in WRs.

We do use these times in world recordruns, please have a look at mkwr or mariokart64 since they have most of the records there