Bill O'Brien probably ain't gonna love this ...
Here's Houston Texans linebacker Barkevious Mingo firing a cannon in Hungary ... and it's terrifying and awesome all at the same time!!
The former No. 6 overall pick in the 2013 NFL Draft is overseas this month to help bring football to underprivileged communities ... and while he was in Hungary on Monday, he decided to take a crack at firing a massive weapon.
We're told the action all went down at Eger Castle in Eger ... and the video of Mingo and the heavy artillery is nuts.