Unexpected situation

What do you do when a friends ask you to do something but you have not asked your parents for permission to go there? 

-I ask the permise of my parents to can go with my friends

Unexpected situation 

1.-write in your blog what do you undestad about an unexpected situation

- I understand for unexpected situation, it's a situation of we can't see coming

2.- Did you have an unexpected situation in the school?  
-Yes, when i have a suprise exam