that was actually quite worrying, but at the same time not....

that was actually quite worrying, but at the same time not. There were around 5 separate orders executed within the space of 3.5 secs. It was definitely an electronic trade, and a bad mistake by the bot/algo. The prices entered varied - were not at market - even though it looked like an @market order due to the speed.

It was a bad trade, and I wouldnt be surprised if the participant is asked to explain that as it effectively moved the price by -15%. Because of this I very much doubt it was an order with any justification behind it. It looks bad on the chart however.