Easy but you would have to be a real cavrone to pull this off.
Walk onto the stage flower in vase.
Put vase on podium
assume meditational posture behind the vase for a minute or two
pick up vase and flower and leave
You could come back and take questions or not depending upon circumstance.
Or if you feel like it provide the name of the sutra perhaps in sanskrit. Or explain briefly the setting and context of the sutra.
Five minutes....the impossible then becomes possible.
"This order considers that progress can be achieved more rapidly during a single month of self-transformation through terrifying conditions in rough terrain and in "the abode of harmful forces" than through meditating for a period of three years in towns and monasteries"....Takpo Tashi Namgyal.