NASCAR Heat

Vortex damage:
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "options.txt" file in the game folder. Change the "vortex damage no" entry to "vortex damage yes". Note: Tracks will take longer to load when this option is enabled.

Glitch: Shoot into the air:
At the end of pit road at Las Vegas Motor Speedway are three asphalt lanes that go right to the infield wall. Hit the middle lane directly in the center of it, your car will sink into the ground, then get shot up in the air doing flips. Note: You must be driving faster than 90 mph.
Information in this section was contributed by CU@THEFINISH and Rough.

Go to the Sears Point track and go up the first hill. When you are at the top, turn left and go through the small gap in the wall. Then turn right, go to the big hill, and hit it as fast as you can. You will be bounce all over the place when you are going through the field. Your damage will be very high (press [F7] two times).
Information in this section was contributed by Rough.

Glitch: Ghost car:
Select the Las Vegas Motor Speedway. Come off pit road and follow the inside road and two roads down. At the second road, turn left and drive slowly (under 90 mph). You will fall into nothing, appear back on the course as a ghost, and slowly change back to your original appearance.
Information in this section was contributed by Rough.