Earlier this evening I was waiting to turn left at a roundabout. Three cars coming from ahead were indicating right, so I gave way to them... the fourth car wasn't indicating so, assuming that it was going straight, I proceeded to enter the roundabout to turn left. The car then proceeded to turn right, then had the audacity to beep me for cutting him off! He then beeped me again when we parted ways at the next traffic lights! Yes... how dare I not read his mind and give way to his not-indicating car!

Maybe... just maaaybe this is why our cars have indicators!