Context: This is from last night / this morning . I was out in the garden , looking at the strong new growth on a clematis - like plant , loving the delicate pink flowers and wrapping the stems around a nearby tree . I looked up and saw a bank of thunderous dark grey clouds , and coming from the clouds were seven or eight tornadoes , all coming in my direction . I could n't believe what I was seeing for a minute , then I went inside to take cover . As I was sharing the flat with L and he was n't there , I tried to contact him on the phone to warn him and ask him to get to safety , but the phone did not work , and I knew that whatever happened , he would be okay .

Question: What may have caused you to go inside after you were out in the garden ?
Options:
0. The storm 's tornadoes had destroyed the garden and I did n't want to fix it .
1. A threatening storm was approaching .
2. There was a new growth on my arm .
3. None of the above choices .
Answer: 1