Racing roadkill
Guru
The complete muppet who shoved their way to the front of the assembled pack, in the bike box, at the traffic lights, with the bus behind, who moved off very slowly when the lights changed, then changed his mind about which way he was going, stopped, smack bang in the middle of the road without looking behind him, and caused everyone to have to dive left and right, to avoid a pile up, and made the bus slam his anchors on. Total organ donor (perhaps not the brain though).