A pushy salesperson is trying to sell you a product you don't need or want- using increasingly aggressive tactics.
Engage in an absurdly detailed and technical discussion about a completely unrelated topic- like the mating habits of Peruvian tree frogs or the history of competitive thumb wrestling.
Invent a sudden and urgent need to leave- claiming a fictional appointment with a llama groomer or a competitive cheese sculpting competition. Bonus points for a dramatic exit.
Feign sudden illness- complete with dramatic coughs- sneezes- and requests for a hazmat suit. Escalate the symptoms until the salesperson flees in terror.
If all else fails- unleash your inner thespian and perform a Shakespearean monologue- preferably one involving ghosts- witches- or copious amounts of fake blood.
Challenge the salesperson to a duel of wits- proposing riddles- limericks- or a spontaneous interpretive dance-off. The bewildered salesperson will likely retreat.
Sales pitch- strong and bold-Met by wit- sharp and absurd-Laughter wins the day.