This is from a post I found that was originally posted to alt.religion.kibology, by Dave A. Largtigue.
You are looking at the shaft. A large red block, four units by one unit, is above your head, dropping slowly. It has its long edge horizontally aligned. 
>turn the block

I don't know how to "turn" something.

The block descends lower.

>rotate block
The block rotates in mid air, now with the long edge vertically aligned. 
The block descends lower.

>move block left

The block shifts to the left.

The block descends lower.

>drop block

You aren't holding the block.

The block descends lower.

>move block down
The block drops into the narrow gap, filling the four columns. The columns flash twice, then vanish, dropping the blocks above them down. A musical tone is heard. 
[Your score increased by 20!]
A square grey block, two units by two units, is now overhead, slowly dropping.
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