In all seriousness take care when charging your batteries.
- don't charge batteries unattended
- if a battery starts to swell or balloon, stop charging immediately get it to a safe place to observe.
- swollen or puffed batteries should be disposed of
- safe lipo disposal: https://oscarliang.com/dispose-lipo-battery-safely/
- always balance charge your lipo's
- I'm sure there are more important tips I'm missing, so yeah just be careful :)