How do you manage 3 curveball throws in a row?

On Pokemon Go in An Inter Egg Siting Development there's a task where you have to make 3 curveball throws in a row which seems impossible although today for first time I managed 2 in a row while catching a Charmeleon worth 5 Charmander candies.  Will most likely break my row streak next time.  Is there a more east way?

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