Theres another 'new' offence that needs to be looked at soon. Probably based on the judo training that became 'de jour' a few years ago, and (allegedly) led to Sam Jones retirement could be seen at the weekend semis.
A ruck/maul thingy is occurring and someone comes in and lists one leg and then rotates the body on the perpendicular axis whilst walking around the side of the thingy to almost come in from the rear and then dump the body downwards on top of the thingy.
Not in the same level of danger, but there are also a few lifted legs, which having achieved the destabilisation of the defender, then gets dropped before being considered "material" by the officials.
Also saw a very brave Chief who from the TV pictures had one hand between Courtney Lawes's rear end during a thingy and appeared to be putting some pressure upwards to lift him? Probably wasn't doing what it looked like because they know they are on TV, but was a common occurrence a load of years back......