look at the video again, there was burning liquid in the pen she tried to dump into the sink.
the video i posted was exaggerated by the firefighters to make the point by using a deep fryer full of oil, but even a normal pen with just some oil is enough for a small steam explosion that will hit you. 

 @Some German Guy @theo h. mann Oh right - that explains the flare-up when she put the pan in the sink, too. It looks like the sink was full of water, and that's why everything went to shit so fast.