Normal event
Helicopter Down
From the Information codex
A gunship is hit by a missile and spirals into a marked crash site. The blast scatters wreckage, then the burning wreck's ammunition cooks off, firing rockets at nearby plates.
How to survive it
Watch for the warning markers before it lands, keep moving between plates, and don't stand where the trajectory lines cross. In Hardcore rounds the warnings are switched off.
More normal events
⚠BlackoutDarkens the arena for a random duration and hides normal visual information, forcing players to navigate with limited vi…⚠Grow PlateRandomly enlarges a plate, sometimes by a large amount.⚠Moon BootsTemporarily gives a player greatly increased jump power.⚠Low GravityReduces gravity for the whole arena for a period of time.⚠MeteorMarks a random point on a plate, then drops a meteor into the exact warning area.⚠Meteor CraterDrops a meteor that leaves a dangerous crater behind after impact.⚠Plate DropTemporarily drops a plate away from the normal arena height before it returns.⚠Shrink PlateRandomly shrinks a plate, reducing the safe standing area.