JET2 is a Single Player level. There is no in-game name for this level, nor is there any documentation. This level is therefore named after the filename.
Walkthrough
From the platform you stand on, watch as a Jet flies by a pool of Water.
Gallery
JET2
Alternate Versions
Aftershock for Quake version using the Aftershock Level Theme.
JET2 (Aftershock)