I've never been able to pronounce Worcestershire Sauce.
It turns out I'm not alone. Worcestershire is on Luke Thompson's most-difficult words list. See his video at 40+ Difficult Words to Pronounce in English.
Guess what! English people often just say, "Wooster" when referring to the condiment. Not fair! As a US citizen I've been determined to master the entire British word.
This over-23-minutes video is really a workout! Toward the end Luke asks, "How's your face?" If you have been pausing and practicing along with him by now your jaw should be tired!