So I saw a video recently, and I can't find it on Youtube. Let me know if you have a copy:
A very viscous, transparent (I think sugar solution) fluid is in a beaker. A needle is used to inject a blob of ink, which remains suspended in the solution. A pole down the centre of the beaker is rotated, shearing the fluid and smearing out the blob into a ring. The pole rotates about 10 times, so that the blob is completely smeared out. The pole is then rotated back in the opposite direction and the blob reforms.
If I can't find a copy of the video I will try it myself.
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