Another kick into the corner, this time from Jack Murphy, can't be controlled by the other Ward brother Bryn as he ends up volleying it over the dead ball line.
It was lovely handling from Ulster before that as they stretched the hosts from coast to coast.
The lights are onpublished at 20:00 GMT 28 February
20:00 GMT 28 February
Ceri Coleman-Phillips BBC Sport Wales at the Brewery Field
As we've seen at the Brewery Field a few times this season, a sea of mobile phone torches come on in the 11th minute in protest of Ospreys owners Y11 Sport and Media and their bid to takeover rivals Cardiff.
Try Ospreys 7-10 Ulsterpublished at 19:57 GMT 28 February
19:57 GMT 28 February
Tom Stewart
Great efficiency from Ulster as, off that great kick from Murphy, they get the maul rolling and Tom Stewart controls at the back before diving over for Ulster's second try.
Doak can't add the extras again but the visitors lead.
Try Ospreys 7-5 Ulsterpublished at 19:54 GMT 28 February
19:54 GMT 28 February
Zac Ward
A first red zone entry and a first try for Ulster! A beautifully-weighted kick into the corner from Nathan Doak sits up perfectly for Zac Ward and he dives over in the corner.
Doak pushes the difficult conversion wide but a great response from the visitors.
Converted Try Ospreys 7-0 Ulsterpublished at 19:48 GMT 28 February
19:48 GMT 28 February
Cormac Foley (Walsh con)
Ospreys win the line-out and go through the phases with the pack. Scrum half Foley - on loan from Leinster - gives a show-and-go to Charlie Irvine and snipes over.
Jack Walsh pops over the extras. Great start for the hosts but Ulster need to get ad oothold here.
Ulster team news - Ireland quartet backpublished at 19:42 GMT 28 February
19:42 GMT 28 February
Ospreys v Ulster (19:45 GMT)
Image source, Inpho
Image caption,
Bryn Ward starts for Ulster
Ulster welcome back four of their Ireland Six Nations squad members, but forward Cormac Izuchukwu is ruled out after sustaining a concussion in training this week.
Backs Nathan Doak and Jude Postlethwaite, plus forwards Tom Stewart and Bryn Ward, are all named in head coach Richie Murphy's starting side.
Ulster: Lowry; Kok, Hume, Postlethwaite, Z Ward; Murphy, Doak; O'Sullivan, Stewart, Wilson; Henderson, Irvine; Dalton, McCann, B Ward.
Ospreys team news - Thomas reaches 150 appspublished at 19:37 GMT 28 February
19:37 GMT 28 February
Ospreys v Ulster (19:45 GMT)
Image source, Getty Images
Wales prop Gareth Thomas' reward for "begging" to be released from Steve Tandy's Six Nations squad will be a 150th Ospreys appearance tonight.
Thomas will run out in Bridgend aiming to prove a point after dropping down the Wales pecking order.
"I was pretty much begging Steve [Tandy] last week if I can come back to play my 150th game at home in front of my family so I'm really excited for it," said Thomas.
"It (his time with Ospreys) has flown, but I'm quite proud to achieve that. If you look at my position, who has achieved that?
"There are only three or four top-end loose-heads who have done it so to be in that group is class in a club that I love as well. It's a proud moment for me."
Centre Owen Watkin, flanker Harri Deaves and scrum-half Reuben Morgan-Williams also return to Ospreys having been released by Wales for URC duties this weekend.
Watkin joins Thomas in the starting XV with Deaves and Morgan-Williams on the bench.
Ospreys: Hopkins; Kasende, Watkin, K Williams, Giles; Walsh, Foley; G Thomas, Parry, Henry, Fender, R Smith, Ratti, Moriarty, Morse.
Replacements: L Lloyd, S Thomas, Botha, Sutton, Deaves, Morgan-Williams, Scully, Boshoff.
Elsewhere in the URC todaypublished at 19:35 GMT 28 February
19:35 GMT 28 February
Connacht 15-10 Glasgow
There was a big shock in Galway thanks to Sean Jansen's last-gasp try to secure a win for Connacht against the league leaders Glasgow.
The Scottish side had hoped to widen the cushion at the summit following second-placed Leinster's defeat by Cardiff on Friday, but instead fell to their first loss in 10 games.
After two second-half tries from Scotland wing Kyle Rowe, the Irish province snatched a much-needed win when Jansen crashed over the line with the final play of the match.
Glasgow remain four points clear of Leinster while Connacht move up to ninth with their fourth win of the season.