(0.9n) VotV - Ambience Mode - Unknown Fast Entity Event

Hello, i am new player to VotV, but i watched a lot of videos abt it, so i started playing it
i was too scared to play story mode, so i am playing ambience mode

it was like day 4 - 6
i was sleeping and i was waiting for the drone to wake me up, but slightly before the drone landed and woke me up, i woke up automatically, i dont pressed the ESC or the drone dont landed yet, i paused and an event was happening, so my first instinct wat to look on the radar, when i looked onto it, i saw an entitity that was somehow fast, and it was mid between the base and the edge, then after while the event ended and the entity was not anymore on the radar
additional notes:
- i was playing on ambience mode
- it was day 4 - 6
- i havent got the color module for the radar, so everithing was red
- it was like 6:00 - 8:00
- i have funny rule enabled so i can find maxwell

please help me identify the event, and if u want some additionional notes, ask me

thanks for helping me!