Based on the context and the answer, generate a question. 

Context: Kroger was $ 3.49 this morning and $ 3.99 this evening and I was pissed . So I decided I 'd cancel all my plans for the weekend and fill up Monday morning . The two gas stations across the street from my house were packed when I passed by .

Answer:

Gas prices had skyrocketed unexpectedly .



Why did I cancel all of my plans for the weekend ?