For those not in the know (probably a lot of people), El Diablo vs RA was a BattleBots fight from season 2.0 of the classic season. RA was a bot that was constructed from an old tyre. In the fight, El Diablo pinned RA under an arena hammer, and it got pummelled repeatedly. By the end of it, they had to take the bot out in a trash bag. RA never fought another fight.
This fight was the most destructive at the time, and even BattleBots themselves joined in on the fun. They edited the fight to feature the 1812 Overture, with the hammer blows timed to the beat of the song. This was hosted on their website, and was available on YouTube for a while, but it's become lost, as the account hosting the video was closed. That gif I put above is the only surviving footage from that video.
The BattleBots community isn't massive, but we've had our fair share of lost media in the past. Does anyone have a copy of the video, complete with the audio?