Hi Roman, It is not exactly a thrill. Since the description is rather hard, I would suggest you hear it pronounced in some thr* words. For instance, https://en.wiktionary.org/wiki/through#Pronunciation /θ ɾ̪̊ ʊ u/ The explanation is in https://en.wikipedia.org/wiki/English_phonology, See Consonants, point 5. This phoneme (/r/) is conventionally transcribed with the basic Latin letter ⟨r⟩ (the IPA symbol for the alveolar trill), even though its pronunciation is usually a postalveolar approximant [ɹ̠]. Best regards, Antonio