I’m not 100% sure what this sign is trying to tell me.
Do not cut suddenly across two lanes of traffic to make an abrupt and (surely) illegal left turn?
Beware of people having realized that they only have a few meters to make their left turn, panicking, and attempting to drive through you to get to their exit?
Beware of educationally subnormal road designers?
Or perhaps, simply, beware of sudden random bouts of chaos?
Sometimes I wonder if I’ve ever not felt like this.