Best tongue-twister of all
UK Guardian has an article about utility customers who lost money in a "botched switch" between companies or coverage plans or something. I couldn't get into the content because I literally can't get past "botched switch".
I'm only moderately susceptible to tongue-twisters; I can handle most of them with a little practice. This one absolutely kills my speech circuits. First time is fine. Second repetition, I skid out and splash into Burtation Creek. Third rep is impossible because I don't have any speech left.
The effect is something like
Botched Switch. Botched Soooooooouuuttrdnyarrr. _______ ______.
Each time it comes out different, but the
skid always occurs just after the S in the second rep.
If I leave out the middle /t/, as in "botch switch", it's easy enough. It's the /t/ that pops my mental gears.