This video was made by Ab Wisselink, on 3 December 2015, near Mariënvelde village (Achterhoek region, the Netherlands). Mr Wisselink was photographing fungi. When he lifted an old piece of wood, he unintentionally woke up two hornets from their hibernation. They reacted rather sluggishly. After making the video, Ab Wisselink put the piece of wood back again.