There is a Hungarian tongue twister that is a good example of why Hungarian is on this list:
"Te tetted e tettetett tettet, te tettetett tettek tettese"
But this is not a representative example of what Hungarian is like.
"Te tetted e tettetett tettet, te tettetett tettek tettese"
But this is not a representative example of what Hungarian is like.
Btw there's a saying that Hungarian originated from a Slovakian guy falling down the stairs and cursing.
Czech has different specialties, like vowelless words (vchrstls) and vowelless tongue twisters (strč prst skrz krk).
Also the weird-looking "nenaolejuje-li mě Julie, naolejuji já ji", which is a surprisingly normal sentence (unless Julia lubricates me, I will lubricate her).
Interestingly, the geographically close but linguistically unrelated Hungarian makes up for all the vowels that Czech eschews. They're almost polar opposites in vowel usage.
However, Phoible is not exactly complete. E.g. Wikipedia has a different list: https://en.wikipedia.org/wiki/Voiced_dental,_alveolar_and_po...
I know that Czech also has Ž, but to my ears we pronounce it harder, so words like žrelo, or žrebiček ... it kind of comes close.