I left carefully wishing I had n't been afraid to take a picture . Saturday evening heavy rain accompanied thunder and lightning . But at sunset a full rainbow filled the sky above our house . It was impossible to fit the entire arc in the viewfinder of the camera but the colour and clarity made it the most spectacular rainbow I have ever seen . It was only a week ago that we chased the last rainbow .

Based on the preceding passage, answer the following question What may be the reason why they were afraid to take pictures ?
Because it was stormy outside .