Bath Rugby's Francois Louw was in the heat of the action on Saturday as the powering back row scored in South Africa's 57-3 victory in City of Toyota Stadium, Toyota.
South Africa scored nine tries in a one-sided affair against Namibia in their second match of the Rugby World Cup.
The first three tries were all from rolling mauls following line-outs, two for Mbonambi and one by Louw, before Mapimpi secured the bonus-point inside 27 minutes with a neat finish out wide.
Namibian fly-half Loubser replied with a penalty before Lukhanyo Am crossed to send the Boks in with a 31-3 half-time lead.
There was no let-up after the break with Warrick Gelant going over before scores for Makazole Mapimpi, Siya Kolisi and Schalk Brits sealed the result.
Watch extended highlights here.