I have three lease breaking stories:
I lived in a shady area of Worcester, MA in a house owned by a slumlord. About a week after one of his houses across the street burned down due to a gas issue, we had a gas leak at our house. We called him to complain, and he said to open the window and he would look at it after the weekend. The guy from the gas company told us to get out, so we took all our stuff and left him a note telling him we were never coming back. We got one angry phone call and told him to feel free to sue us (students with no cash). Never heard from him again.
Two apartments later, my roommate met a girl he HAD to move in with, so he ditched me and I couldn't afford the rent anymore. Had to buy out of the lease, which cost two months rent.
But the WORST lease breaking story involved a photo copy machine. I was cleaning up the remnants of a defunct software startup, and one of the loose ends was an office-sized copy machine. Those guys were awful. Harassing phone calls for weeks. You'd tell them the company was out of money, and that they should come get their machine, and they would say the meanest nastiest things. They claimed to want to force the corporation into bankruptcy court to prove we were really out of cash, even though I had all the leverage (I had their machine, and the company had practically no cash left that they could sue for). The refused to settle for what I thought was a reasonable amount of money; they insisted the only out was to pay the rest of the lease in full. Eventually I put the machine in the bathroom of a publicly accessible lobby, installed a padlock on the door, and mailed them the key and directions. Then I called and told them if they ever wanted their machine back, how to get it, and to go ahead and sue the dead company if they wanted. The guy on the phone made some unsavory comments about my mother, but the machine was gone the next day. No idea if they took it or if somebody else did.