Wristwatch Unique

What are some great tongue-twisters?

I know a few good ones such as “Unique, New York” and “Irish Wristwatch”, but does anyone have any other really good ones?

They don’t have to be short like the examples above, you can answer with a longer one such as “She sells sea shells…”

The harder the tongue-twister, the better. Please do not repeat any, or use the ones above. Post as many as you want.

Six slippery snails, slid slowly seaward.

Silly Simon’s sitting in a shoe shine shop.
Where he sits he shines, and where he shines he sits.

I wish to wish the wish you wish to wish, but if you wish the wish the witch wishes, I won’t wish the wish you wish to wish.

The sixth sick sheik’s sixth sheep’s sick.

If two witches were watching two watches, which witch would watch which watch?

Sarah saw a shot-silk sash shop full of shot-silk sashes as the sunshine shone on the side of the shot-silk sash shop!!!.
—

1970 Bulova Accutron Model 218 Wristwatch