Donny Cheng said:
<<Or just plain heat.  In the first movie Ranma was surrounded by hot
water and it was coming up from the ground from all sides so he didn't
need to do the spiral.  That was how he could do the HSH.  The second
movie as it is noted, the attack the two sisters used was a spiralling
heat attack.  Personally, I don't think he even needed Akane and could
just have fired off the HSH.>>

Excellent point I didn't think about that.

Various people say:

<<It's Anime, that's all I can say...>>
<<  First of all 'The One to Inherit the Dojo' or whatever is not a
movie... it's just an OAV.>>

All these are simply excuses to end topics and nothing more.   Though, the 
manga may have domain , if we chose to talk about the anime.  It'd be 
appreciative if you guys don't just come on and say "it's non-cannon" or 
"it's anime" or "it's an oav" or worst of all "it doesn't count."  We all 
know that because you've said it a million times. So, you can stop and just 
let us talk. Alright?