You go outside and see it's a very glorious day with the sun shining and the birds singing. So you get on your bike and start  riding to school as fast as you can.  You see your friend Michael; you slow down to talk to him.  He sees your bike and knows it's you. Then he asks if you did the homework. You say yes,  but then you think twice. So you decide to check your backpack and it's not there.

You want to go home and get your homework.

or
You want to keep going to school.