Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: This happened many years ago but I still feel bad about it.

I was travelling by coach with a group of friends and was sitting on the last row (the one with 5 seats) right next to the middle seat where my friend was sitting.
During the journey I left my seat for a while (maybe 10 minutes) to chat with another friend. When I went back on my seat I noticed my friend was dozing off. As I was sitting down this friend held my arm and said in a very stern way “don’t sit down”, but it was already too late - I had sat on his sunglasses which were on my seat and had crushed them. 
I apologised saying I had not seen them (both the seat and the sunglasses were dark colour), but he was really upset and said it was my fault for being careless. (He also added this were the only sunglasses that prevented him for getting headaches and all the other brands had been useless.)

I didn’t have money to repay for his sunglasses (I didn’t have money to buy myself a pair of the cheapest sunglasses). 
So AITA?

breaking my friend's sunglasses