I once did the same,,,,, on a motorway at 120 km/h or so, the other car was generous with its horn,,,,, and i felt really small and stupid.
I have also tried toe same, also on a motorway, where the car pulling out dident see that i was going 60 - 70 km/h above the speed limit ( flat out )
Fortunately my forward facing attention are better, so the moment the car in front of me shifted a few inches to the left i was on the brake and totally defused that situation.
In general trust no one in traffic.
I few kids was wounded and 1 killed in a night time solo accident here a few days ago, the new driver tried to avoid a rabbit on the road and lost control of his car.