Charging into the body of a defenceless player on the ground is a dangerous and inflammatory act and Lavanini could have caused a lot of damage when bringing his right knee - and the full force of his 118kg frame - on to Visinia's upper back area.
Clearly Lavanini, who admitted his guilt and in doing so brought his suspension down from two weeks to one, hasn't learned from his week on the sideline.
Ihaia West was another victim of a knee drop after he scampered away for his try by the posts in the first half. This time the transgressor was centre Matias Moroni, who dropped his right knee into West's upper left hamstring/buttock area. It happened in full view and again nothing was done about it.
In the second half, Lavanini's head-first charge at loosehead prop Nic Mayhew's right knee forced the North Harbour player off the field with a medial cruciate ligament injury which will sideline him for up to three weeks. The tackle could have been simply clumsy, but it looked eerily similar to his no-arms charge at Australia fullback Israel Folau in the World Cup semifinal in October, for which Lavanini was sinbinned.
Certainly, Blues coach Tana Umaga felt it was borderline. Umaga has been wary about criticising officials or opposition players during his first year as a Super Rugby coach, but he felt moved to say something about Lavanini's tackle on Mayhew, and hinted the match had been marred by other incidents.
"Safety's a big issue, diving at people's legs - if it's technically within the law then obviously that's fine, but if it's not then it needs to be looked at," he said. "Everyone saw what was happening out there and we'll see what comes of it."
Nothing has come of it, and the Jaguares, who otherwise play with such ambition and skill, should consider themselves lucky.