The Kiwi forward made quite the reputation for himself as a PRO12 enforcer when he was on the books with Treviso.
Luamanu is now plying his trade with Harlequins and has a whole new league to toy with.
Last October, he welcomed Aussie flanker George Smith to the Aviva Premiership by trying to bury him deep, deep in the turf:
He followed that up, a week later, with this monstrous fend-off on Fijian winger Seremaia Bai:
That was all too easy for Luamanu. He went looking for bigger targets and found one in 6' 7" Matt Banahan.
Some say the collision could be heard two towns over.
Last weekend, the 132kg forward was at it again. The recipient on this occasion was Worcester Warriors out-half Tom Heathcote.
This was some impact.
Next up for Quins, on Sunday, is a trip to Northampton to play Saints.
JJ Hanrahan, watch out.
Next up for Quins, on Sunday, is a trip to Northampton to play Saints.
JJ Hanrahan, watch out.
