I actually bib, flash my headlights and wave to them to get their attention, funny how they know exactly what I mean.
Another one, those that let you out, but raise their finger off the steering wheel, point at you, and then move their finger in the direction for you to go, just the once like they’re in charge and ordering you around, many a time I’ve just told them to ‘fuck off’ and waited for someone who has the courtesy to look at you, give you the thumbs up, and wave you in (like I do), funny how they know exactly why you’re doing it too, guess there’s just loads of arrogant wanker drivers out there.