When you stick your hand out of the shower to grab a towel and it is missing because it is being washed and you have to run naked and freezing across your bathroom and grab a towel from under the sink.
The ability girls and women have developed to hold several items at once in one hand. The skill has been developed due to the lack of pockets in women's clothing.
I thought she'd need multiple trips to carry her phone, keys, wallet, and Starbucks to her car since she needed the other hand to open the door, but she used her impressive girl grip to carry everything in one hand.