Ahahahaha, run! XD Wait, no don't run! Well I don't think he will be able to if the pace keeps up >:3 This is turning out awesomely dude, love how his paws are there. Really shows a panic and the eyes are really cool! ^_^

Loooooooove that small little starter gut. <3

Well now it looks like the machine is going full power and he has no chance of escaping ;D

Excellent choice of belly size in this. It really matches well to the speed of the amchine puffing him up, but also matches the progress from the previous images. I rather enjoy the added jiggling details to show its growth, it makes it feel like it's still growing and not at a stationary size before getting another growth spurt :) Love his reaction in this as it really reveals true shock and even dismay over his situation, which really adds a pelasant comical value to the image. Great idea having him hold his head like that too, not too many people do that with their characters so it's a nice treat to see done :) Also, I like how the machine is now pumping faster at this point with more evenly sized bulges. Gives a nice sense of continuity towards his growth and makes them link and match nicely :)
There's only one minor thing I can see involving the legs. Given how his upper body is positioned, the legs don't look properly positioned in terms of angles. I'm not sure which one is the cause, but I think the right leg looks a bit twisted inwards compared to the other which is pointing outwards.

Nice work with this series man :D