Hmm the pecking order continues

Had a nice uneventful ride in today, until the roundabout outside the office. There was no traffic in the outside lane, and only a scooter in the middle so I pulled out. The scooter then buzzed in behind me and shouted that it hadn't been safe so I shouldn't have pulled out. I'm a good judge of closing speed (you have to be to survive) and there was no way he was going quick enough for me pulling out to cause him to brake, and besides he wasn't even indicating to change lanes. I half pointed this out, but I have a feeling he accelerated to make a point that while cars may bully him out of the way, I'm still further down the pecking order...sod that.