JSP Mk3 Helmet Penetration Test

In this video, we have a close up view of the JSP Mk3 Helmet. We've seen impact tests in earlier posts and we've also seen the effect the test weight has on a certain member of the Cucurbitaceae family (watermelon - I was trying to be clever).
Here we can see the 3kg 'spiked' weight, which has fallen from a static point 1 metre above the test subject...