This was actually from the end of last term but have only just got permission from my students to share it.
Our Year 11 Geography classes were starting their Extreme Natural Events unit focusing on volcanic eruptions. After an introduction to plate tectonics I showed my class a video made by some students of John Sayers. You can see it here. My students fell perfectly into my trap by criticising the video at which point I challenged them to make one better.
A variety of videos were made utilising different props but this one was by the only group game enough to actually publish theirs online. Enjoy!