Upright behaviour

I love to see bees co-operating. It's been raining heavily during the last few days and I noticed that in the little nucleus (very small colony) in the garden rainwater had collected in a pool behind the door. So I removed the door to try to release the water, but the puddle just sat there. Meantime a bee managed to end upside down in the water and was struggling to right itself. She struggled in vain until another worker came along and more-or-less headbutted her into an upright position. Brutal, but effective.