Rassie Erasmus lit the blue touch paper by accusing the British and Irish Lions of "reckless and dangerous" play in the first Test against South Africa.
The Lions fought back in the second half at Cape Town Stadium to beat the Springboks 22-17 on Saturday in an attritional contest to open the three-match series.
Erasmus posted a clip on Twitter on Monday showing Ali Price tackling Cheslin Kolbe close to the touchline late on, before Mako Vunipola picked the wing up off the floor.
South Africa's director of rugby wrote on his verified account: "Cheslin is obviously played in the air and clearly not in touch!
"More importantly for youngsters watching this clip, please never move or touch an injured player on the ground, it's reckless and dangerous.
"Leave this to the [medics]."
Erasmus had also been busy on social media on Sunday, retweeting clips from a user highlighting "questionable calls" by officials.
He wrote when retweeting one of the clips: "Thanks. This is rugby - sometimes calls go for you and other times they don't."
South Africa and the Lions lock horns again in the second Test at the same venue on Saturday.
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