Willis apparently has a big fear of snakes. He has done various things to overcome his fears, and he decided to add snakes to the list. This was the caption on the video/pictures below:
I told y'all yesterday about one of my biggest fears in life is walking through the corn fields back home in tn as a kid to go fishing and see a snake this big well really any snake but especially something this big and I can't run b/c I have passed out and it gets me but after yesterday I'm ready now. #fears #LetsGo! Big ups to my homies @takeospikes51 and @carlosemmons for capturing this moment that I didn't even know they had until now
If you watch this video, you can sense how nervous he is with the snake around his neck. We never see a "scared" Patrick Willis on the football field, so it's kind of interesting to see this side of him.