A few years ago on the 'Vodaphone' roundabout, Purley Way in Croydon a driver was killed when he got his cement mixer, with a full load, onto two wheels and crashed it on it's side. No others hurt or injured.
In the aftermath the emergency services closed the roundabout to salvage the mixer, which took about 3hrs.
During an hour of this time Ms. tdr1nka & I who lived locally then, stopped to watch as the mixer was emptied and then set upright using enourmous inflateable bags.
As the roundabout was shut off cars were being diverted but a lot of cyclists and motorcyclists pulled up to watch and ask what had happened. Almost to a man they all made comments to the effect of bad luck to the driver but how leathal a cement mixer can be just from all the cr*p that they throw out when you're riding behind them, let alone your chances of surviving being hit by one.
Fingers crossed and thoughts go out to that cyclist.