I don't like them, they look more like the cat is being threatened more than anything.
Agree for the second (the one in the t-shirt). For the first two, the cats-on-hind-legs GIFs are actually of backwards film, so the cat is actually advancing towards something in those (likely a toy moving around, possibly a small remote-controlled airplane or something). [Years ago I studied a lot of Harryhausen's animation frame-by-frame before doing some of my own, so pick up on movement anomalies some may miss: the most telling part in the first it is when it jumps 'off' the table, in the second it is near the end when its head is moving back and forth quickly.]