I’m going to let the cat out of the bag here! He’s talking about stabbing your way out.
A great video that makes the point – that is so often echoed here – that context is king!
We drill this and it makes for a very different type of ground fight. As the instructor, in regular sparring, you simply can shout out “the right fist of person on top is a knife” and hence all blows and scrapes with that gloved fist should be consisted as stabs and cuts. I also scatter soft items such as focus mitts on the matt that people can pick up and use as if they were bottles, rocks, glasses, etc. Again, it just adds in another element.
All the best,
PS Stephan Kesting has some great vidoes (YouTube Channel).