Have a character who comes from a place with very mild and not particularly flavourful food eat something that's super intense in flavour before having them then collapse from all the taste assuming that they have just been poisoned.
As an example maybe the sweetest thing a character has ever had is a little honey stirred in warm water or maybe an apple or pear, then imagine them having a super sweet highly sugar saturated soft drink and proceeding the spit most of it out and yelling "What the hell is this poisonous nectar you've had me consume" before collapsing on the floor and looking absolutely haggard.
















