This is unquestionably all Timothy's fault! It ruined an entire years work (DE's). This included a piece of science homework for the lesson following the lunchtime in which this disaster happened.
It was, however, surprisingly undramatic. Timothy just walked around the steps by the pole, above DE, and science folder, and work, spilling his pudding from the pot onto the work. He then went away and didn't help at all in cleaning the spillage from all the ruined work.