Snake stops play

Midway through the second half, I cut out a pass and knocked it over to one of my players. One of the players on the other team raced over to challenge. Suddenly both of them turned and backed away from the ball, yes, there was a snake on the pitch. A snake that did not appreciate a regulation size 5 ball landing close to it. The referee chased it off the pitch, and the game restarted with a drop ball, as the handbook clearly states after a snake invasion...