1. Don't open a hive when it's cold.
2. Don't open a hive when it's windy.
We broke rule 3 after about twenty minutes:
3. Don't open a hive in the rain.
The first hive was a drone layer.
The second hive was a double nuc—it survived the winter with only 8 frames. I wanted to check the condition but the frames were pretty tight and then it started to rain.
I shortened the class.
The power was gone when we returned home.