We've seen this with Hawaii's volcanoes because the lava flows slowly, people can get away quickly and it rarely results in victim, but thick and sticky magma is a different story.
Then we pour the tomatoes into a colander and let them sit to drain. We repeat this process in the microwave until the sauce reaches the thickness we're looking for.
In this programme, we've been hearing how scientists are using jellyfish mucus - a thick, sticky liquid produced in their bodies, to break down microplastics in the sea.