Our teacher told me I was the worst student in the class in front of everyone! What could I have done?

I was flirting with a boy at a snackbar the other day. Whenever I looked at him, he smiled. After a while I went to the restroom and when I looked myself in the mirror I noticed I had something on my teeth. What should I have done?

I recently took a bus to work and it was crowded. When the bus stopped at a bus stop a young lady with a big belly came in. So, I offered her my seat. She looked at me and angrilly said she wasn't pregnant. What should I have done?

On the bus recently, someone trod on my foot and said nothing. What should I have said?

I forgot my best friend's birthday last month. What should I have done?

I hit my neighbor's car as I was leaving my apartment building's parking lot. Fortunatelly no one saw me, so I drove off. I felt bad afterwards. What should I have done?

I took the bus last week to go to the mall and meet my friend. When I was on the bus I noticed some people were looking and giggling at me. When I looked down I realized my sweatshirt was inside out. What should I have done?

I found a purse on the beach with $200 in  it. What should I have done?

I called a pizza place this weekend and ordered my usual. Talked to the very nice secretary who took my order and then instead of saying "Thanks, bye"... I said "Love you, bye". What should I have done?

Last week, after a long time at home, I decided to go for a walk. Someone called my name and said "OMG! Long time no see! How are you?", kept on talking and I didn't even remember the name of this person. What should I have done?

I was overcharged at the supermarket. What should I have done?

Last weekend, the waiter brought me cold soup. What could I have done?

I was walking on the street these days and I saw a friend of mine. I waved at him and said hi but he didn't answer me back. When I approached him, I realized it wasn't him. What should I have done?