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Sounds like Morse code to me. :) 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).
In addition Czech has the sound ř, which is almost impossible to pronounce unless you learn it in childhood. I don't know of any other language with that sound. Tongue-twisters will almost by definition explore the weird sound combinations in any language, but Czech is a fruitful hunting ground for these! Interestingly, the geographically close but linguistically unrelated Hungarian makes up for all the vowels that C…
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.