I remember Twoago catching (and swallowing whole) a live bluebottle - which stayed buzzing in his throat for about 25 minutes. He sat very still and the look on his face was comical. (If only I'd had a digital camera in those days.)
Mine is too! I think Spring is sending him crazy... He is also incredibly greedy so when I was out in the garden eating lunch yesterday you could see him going "sandwich...bumblebee...sandwich...bumblebee!"