At the dinner party, Jonas says "...I'm just going to watch a little bit more of the news", but when Liam replays this scene later at his home, Jonas says "...I'm just going to CATCH a little bit more of the news".
This is to demonstrate that the recorded Grain memories are as reliable as true memories, as discussed during dinner.
When Liam hits Jonas with the Vodka bottle at 34:54, Liam's shoulder and head are briefly visible. The grain is in their eyes so this shouldn't happen.