Saving Cardiff from rampaging aliens wasn’t unusual for Torchwood, the Rift saw to that.
It wasn’t even that unusual for aliens to explode unexpectedly — earth conditions were hazardous to the health of many non-terrestrial species, so Torchwood had become adept at getting various kinds of alien gloop off clothing, pavements and people. Sometimes the gloop stained, but Ianto was amazingly good at stain removal. Usually.
Not this time though. Jack was bright blue and apparently there was nothing that could be done.
Owen, of course, found it hilarious.
“Guess you really are a true blue hero,” he sniggered.