[res0nat0r]

Another reason to always always always setup AWS billing alerts: https://aws.amazon.com/about-aws/whats-new/2012/05/10/announ...

This can POST to a URL, SMS you, email you etc. Set a $ threshold you are comfortable with and enable this right away.

[arijitraja]

Absolutely, spot on. This is the best way to avoid this situation. Thanks, I will put this in the blog somewhere.