Demonic Spiders: The Town Square bumpers are located just above the left outlane and can send your ball into it if you're not very careful, while a drain in the right outlane is comparatively rare. Some arcades will install a guard around this area to prevent balls from being bumped into the left outlane.
The Powerfield's "Magna-Flippers" can be unreliable depending on their condition, making a Battle the Power victory much more difficult than it needs to be. Plus, it's not readily obvious how to use them effectively.
Any successful Skill Shot sends the ball into the rocket kicker, which shoots it across to the hitchhiker tunnel...from which it exits into the Town Square jet bumpers and can potentially drain down the left outlane. There's no ball saver enabled by default, so if you don't own the game or the operator has chosen to not enable it, skill shots are basically suicide. Some players advise just skipping the Skill Shot entirely.