Monsters Well After Dark

Just like Space Mountain used to have back in the day during Halloween Time, the Guardians of the Galaxy attraction has a sinister Halloween overlay that's exclusively only to this time of the year.  Starting in the afternoon hours, Guardians goes from its Mission: Breakout experience to its Monsters After Dark experience, which features its own soundtrack, a different storyline, and a scarier ride than normal.  On the outside, the nighttime projections onto the ride building change from its normal hues to occasional siren-sinked alarms and visual warnings.  Everything seems to settle down after the end of the operating evening, but we know that the beasts inside are still lurking and waiting to spread havoc the next night.

The Guardians of the Galaxy ride features a monstruous overlay during Halloween Time, though the exterior doesn't always overtly show this.