Cycling road rules in SA....

[PepeLePew]

I was out on a country road today single lanes each way....and came up behind a nice old Mustang out for a cruise. Sat behind him for a while just loving the view but he was sitting about 15 under the limit so eventually did a gradual SLOW pass, clear road. Anyway....there was a cyclist on the other side of the road just outside the line riding along, that i saw, was aware of, and hence kept it nice and measured and kept a very good distance from both the Stang and the cyclist.

Bear in mid I'm a cyclist too...and its not a road I'd choose to ride on. But if i was i'd just ride carefully on the verge and provided i was treated with respect it's all good. Now my relationship to the cyclist was likely better than a vehicle coming up behind him even, he has a clear view of me and I was very conscious of leaving him space.

This guy (older fellow maybe 45-55?) starts waving his arms like I'd committed some cardinal sin. I nearly went back to see what his issue is, but he may have thought i was being aggressive when really I just had no idea why he was gesticulating. Of course maybe he had a flat and wanted me to chuck the bike in the tray and I'm reading too much into it.

Is there some rule that I'm not supposed to do that? Simple question....happy to be corrected if I was in the wrong. If there is no rule I'm aware that's not clean cut if I should've or not and I'm always happy to respect a cyclist, but it was a perfectly safe pass and i could see no issue.

If anyone knows for sure one way or the other?