How do you bridge arbitrum back to ETH?

How does one effectively bridge the Arbitrum blockchain back to Ethereum (ETH)? Is there a specific process or set of steps that need to be followed? Are there any potential challenges or risks involved in this process? Understanding the mechanics behind this bridge is crucial for those looking to seamlessly integrate their Arbitrum-based assets with the broader Ethereum ecosystem. Can you provide a detailed explanation of the process, along with any recommendations or best practices for those looking to execute this type of bridge?