hen dropped from an aeroplane, elastic band balls of 1.41M diameter do not bounce.

imagine a 'W' at the beginning of the last sentence and it might make sense.

A grommet is one and two thirds groats.

A hen dropped from an aeroplane would be able to control its descent with a 1.41m ball of elastic bands.

If a meteorite the size of a house brick were to strike Loch Ness, all life within the Loch would be ended and thus conclusive proof of the exictence or otherwise of Nessis would be garnered.