A long miss-pass from Marco Zanon seemingly puts Jacopo Trulla in for his second try - only for a blast of Luke Pearce's whistle to stop him in his tracks.
On reply, the official got that right - it was slightly forward.
The Dragons still have a 10-point buffer but these are tense moments.
That looked ominous. Dragons have a scrum but are shunted off their own ball and Zebre get a penalty.
It's a kickable one but no, Giacomo Da Re goes for the corner. Another penalty, and another line-out chance soon follows - but the ball goes loose and Niall Armstrong can clear.
Bautista Staville comes in from the side and puts hands on the ball right in front of referee Luke Pearce. Not the most subtle bit of flanker play that.
Inevitably he's penalised and from 20 metres out, Angus O'Brien again does the business with the boot.
The 27-year-old, who made his Wales debut in July 2025 against Japan, has made 88 appearances for the Dragons, scoring four tries.
"Dragons is my home region. I genuinely love training and playing with some of my best mates, especially in front of a packed Rodney Parade," Coleman said.
Gwyn Jones has already summed it up aptly. The perception pre kick-off was that tonight represented a huge chance for Dragons to make the semi-final of a European competition - and that remains true.
Twice, they have been in the Zebre 22 and it has yielded 14 points. But ill-discipline hasn't allowed them to ever take control of this - and both home tries came moments after the visitors were shown a yellow card.
Opportunity still knocks for the Gwent men in Parma - but they will have to shore things up to take it.
The score had to come after prop Muhammed Hasa is held up inches short, but from the next play centre Giulio Bertaccini dives over from barely a yard out.
Three times the Dragons have led. Three times they have soon found themselves all square again.