User blog comment:Willbachbakal/Singleplayer Enemies: Hawker/@comment-3024470-20101207012529/@comment-1330314-20101208075643

Actually, I think the only way you could blow up a BD's tank was to hit it first with the Wrench and then shoot the oxygen cloud above, and even then it's never worked for me, either because I'm doing it wrong or the guy who put that tip in the first place was a very good liar.

He's actually fairly vulnerable to melee attacks as it is, though: if you corner him and attack him with your melee weapon (in this case, the Knife) he'll be unable to defend himself save for a very weak melee push.