The clip comes from South Africa’s 22-17 defeat in Cape Town on Saturday and sees Ali Price tackle Cheslin Kolbe close to the touchline before Mako Vunipola picks the Springboks wing up off the floor.
“Cheslin is obviously played in the air and clearly not direct into touch!! More importantly for youngsters watching this clip!!!!” Erasmus tweeted.
“Please never move or touch an injured player on the ground, its reckless and dangerous!”
It comes the day after Erasmus, South Africa’s director of rugby, retweeted a post from an anonymous user showing some “questionable calls” by the officials against the world champions.
As part of the retweet, Erasmus adds: “Thanks. This is rugby – sometimes calls go for you and other times they dont”.
In a twist, the anonymous poster named ‘Jaco Johan’ uses the same type of graphics – a yellow circle – to highlight the alleged foul play as Erasmus does on his official account.
Erasmus had raised eyebrows earlier in the tour by acting as a ‘water boy’, a role he reprised in the first Test.
Lions coach Warren Gatland’s anger has been piqued by Erasmus’ pitchside duties, hinting that the Boks boss has at times wandered onto the field in breaks of play without any water.
Erasmus is believed to be using the role to issue instructions to his players.