People who think their car can go from 0-60 in 0.25 seconds pulling onto a roundabout.
Got beeped several times and the finger (once he caught up with me) from a lovely chap who obviously thought I shouldn’t have pulled out onto a roundabout despite there being plenty of space and time to do so. Given he didn’t actually catch up with until after the roundabout, I really can’t see what his issue was!