Fork

The fork (internally known as tree) is an obstacle that features a skinny, long rectangular glass bar that splits up to 3 shorter glass bars. It is only found in Checkpoint 9, Stage 3.

It is spawned either hanging upside down on a metal pillar, or hanging from an underground metal pillar, from which the fork spins.

If you do not have multiball then you might have to destroy each of its glass bars. Luckily, the pillars do not move. The fork is a rather easy obstacle to get through.

Color
It appears to be colored green, because it is exclusively available to Checkpoint 9 only. (Note the color of the glass is black and translucent.)