How often have you just tried something out, realised it was just perfect and then couldn't recreate it successfully? I know I have plenty of times. From now on, you can use the free Max for Live audio effect Audio Treasure by Max for Cats and at any time recover the last two minutes.
Simply add Audio Treasure to your master track and it will constantly record audio into a two minute ring-buffer. You can write your magic accident to disc and re-import it into Live. You only have to remember that currently only the last two minutes are kept.
This way for heaps more Max for Live devices & tips.