Butterfly flying upsidedown? I must be going crazy!

I THINK I MUST BE GOING CRAZY!!!!!
Is this white butterfly REALLY flying upsidedown or do I need new glasses?? Sorry it is a lousy shot but I had to share this.
I see there are actually 4 insects in this picture .....
I LOVE my work .... everyday there is something amazing in my life!!

I have been told that some butterflies do a back-flip like this in order to avoid predators but this is not easy to capture. Have to admit though this was taken by pure accident and did not notice it till I was processing the pictures.