In Terminator 2: Judgement Day (1991), as he walks away from Arnold you can see the T-1000 "pulse" into liquid metal for seemingly no reason - In the deleted scenes, it is made clear the T-1000 is malfunctioning after reassembling itself and is struggling

In Terminator 2: Judgement Day (1991), as he walks away from Arnold you can see the T-1000 "pulse" into liquid metal for seemingly no reason - In the deleted scenes, it is made clear the T-1000 is malfunctioning after reassembling itself and is struggling