Slow ramp abuse
Slow-ramp-abuse (SRA) is tech that relies on the unique properties of slow ramps. It is used to superglide.
Overview
Upon making contact with a slow ramp, the vehicle will bounce into the air and decelerate at 3u/f2 until internal velocity (IV) reaches a specific value. This value is typically 50.0 or 73.0, but changes depending on whether a wheelie is occurring, as well as the type of ramp. After falling back down and making contact with the road, the IV lock will end and the vehicle is free to accelerate.
However, in some situations, the player may make contact with a slow ramp and not enter the air after doing so. This is most easily achieved with a well-timed hop or a slope change. As a result, the check for landing after airtime (which unlocks IV), is never met, and so the player can glide around the road in a very unique state.
History
Slow-ramp-abuse was first popularised by the 2011 custom track Calidae Desert, which included a large slope on the last turn with slow-ramp properties. This enabled players to easily enter a strange grounded gliding state characterised by limited control of the vehicle's travelling direction, as can be seen here. This would later be proven reproducible on Nintendo tracks, as demonstrated by Reo in his 2014 Mushroom Gorge TAF, through the use of the ramp inside the cave. Alongside Mushroom Gorge, it is possible on GBA Bowser Castle 3 (see here) and SNES Ghost Valley 2 (see here).