Theres a shit-ton of other glitched involving the 2D sections, like Camera spasms, the famous 3D glitch, and the invisible stage glitch (can always be pulled off in classic Seaside Hill).
Not really anything that affects gameplay, though.
There is also a glitch where if you equip power brake, go into modern Seaside Hill, and stop staight away, you can turn around and go back into the scripted scene area, andf if you have endless boost equiped too, you can run around on the water behind the stage for as long as you desire. Not a bad glitch, IMO.