It seems like it requires inhuman reflexes to dodge the attack. There's like a super short charge animation and then it stretches and occupies the whole screen length.

Yea that attacks definitely too fast to react against. Your best bet is to anticipate Cagney going up or down with stretchy face after he is finished spamming seeds. If your already on top of a platform and he's getting ready to attack upwards drop down on the platform to avoid it. If your on the ground and he's going to attack downwards jump on the platform to dodge it. Hopefully this helps you out, Cagney is pretty tough to beat.

I found that standing on either the middle platform or on the far edge of the nearest platform to cagney gives you a very small but noticeable amount of wiggle room to react to whether the attack is going high or low. Other than that i suppose its down to simply training yourself to see what animation its doing and reacting fast to it.

Pretty sure my that it was broken thanks to them tampering with the animation when you hit the fuzzy things in the third phase, that might have caused it to speed up some animations somehow. Or it was caused by them fixing the cagney freeze glitch. I don't know how they wouldn't have noticed this through play testing before haphazardly releasing the patch, but what can you do, I guess.

i agree diggity, it's pretty much the only undodgeable attack in the game, for me at least

From testing ive seen that at least on simple difficulty (havent gotten the chance to try regular or expert) the stretch attack is always alternating, so it wont attack the same spot twice. Either that or i got lucky in all my attempts and it just worked out.

cool thepotato, i'm the same guy who was asking about it in your stream btw 🙂