Answer:Look up as high as possible
Explanation:One of the simplest thing to do before any emergency help arrives is look up up to the roof for some time, this ensures that the epiglottis is covering the wind pipe and all the saliva that is being secreted is going down the esophagus only.Try and take a deep breath in the meanwhile, without getting panicky.
One or two deep breadths shall ensure the movement of the seed and the panic would have settled.