Need inspiration? Use one of these suggestions:
I'm going to need you to come in on Saturday. I'm going to need you to come in on Saturday. I'm going to need you to come in on Saturday. 
Not again! 
I'm starting to regret my choices 
What did I get myself into? 
Just another day at the office 
That's a costly mistake 
Oops! I guess I didn't read the fine print 
How could I have been so careless? 
I should have known better 
I'm not sure I'm ready for this 
Time to face the music 
Oh no, not again! 
How did I get myself into this mess? 
Looks like I'm in trouble 
When your car gets towed for unpaid parking 
Today is not my lucky day 
All this trouble just for a parking ticket 
What was I thinking?! 
Is this really happening? 
Here we go again... 
When you realize you forgot to pay for parking 
You know you're in trouble when you see the tow truck 
Whoops! Looks like I'm in trouble 
How did I not see this coming? 
That looks expensive 
Don't forget to pay next time