What the Deuce . . .

It’s only our plecs acting daft (as usual) and there are two of them, so I reckon that this just about fits the MonoMonday theme of ‘duece’.
 
Sorry it’s a tad grainy, but that was in very low light at ISO 12800 (just pretend that it's just the mucky tank glass . . .?).
 
Thanks to JohnEdward  for hosting MonoMonday this month.