My cousin bought a used professional coffee machine that looked like a piece of industrial equipment - tread plate and all.

Most of the time he would ask you if you want your coffee too sour or too bitter, but this one time he managed to get all the parameters so right, that he brewed something which tasted like thick, coffee soup.

Outright teleported me to 1960s São Paulo to which I've, BTW, never been.

I've been chasing this taste ever since, but my cousin still hasn't been able to repeat the feat.