Harlequins player had just returned from a ban
Harlequins and England prop Joe Marler faces another ban from rugby union after being cited.
It is alleged he kicked an opponent in the head during Friday's European Challenge Cup semi-final against Grenoble.
The incident wasn't seen by the referee but footage captured it:
It was Marler's first game since a two match suspension for verbally abusing Wales' Samson Lee during the Six Nations.