Shake well before use.

The new entrant was given the job of mixing liquid ingredients with a catalyst for use in a painting application. The new entrant was little assuming in nature and prided himself in doing things without being told.

He proceeded to mix the composition and started the application. After a time gap, his senior came to inspect the completed job. When he touched the surface his fingers became wet with the paint. The senior man understood the situation and calmly said “It is advisable to shake the bottle before use” and left the scene without another word. When the reality struck him, the new entrant understood very clearly the wisdom of shaking the bottle before use.

The senior man and the new entrant then started a guru-shishya relationship which later blossomed in to a family friendship!

[The narrative though set in a specific environment , could have taken place in a paint manufacturer's test lab. This setting helps the reader spin their own yarn :) ]