The brilliant plans I found went hand-in-hand with the original plan, with a few Weasley modifications, of course.
Our rockets with cat-sized lions would also (when exploding) yell our names, in mer-mish (or whatever mermaid language is called). Brilliant no?
I'm still wondering who came up with this!
"You guys ready?" I asked the twins, rockets in hand.
"Yep." they replied, with matching grins the size of Montana (if that's possible...).
I changed into animagus form (a small, grey tabby cat), and Fred whispered the password to the Slytherin common room door.
When it opened, I grabbed one of the rockets (which was WAY too much for my animagus to carry, but I managed), and slipped in, while the twins found a way to prop open the door, so they wouldn't have to keep saying the password.
When we finally finished, I changed back into me (covered by a blanket of course).
"Let's get back to our OWN common room, and get to bed, okay guys?" I said.
"Sure thing," Fred said.
"We've got to hurry, I spy Filch on his way here!" George said, looking closely at the Maurader's Map.
Early the next morning, we snuck down to the Slytherin common room door, to set off the rockets and hear the Slytherins freak out!
To our surprise, Snape had come in for an early-morning dormitory check (since SOME naughty Slytherins had been sneaking into the wrong dormitories). So, of course, it was detention for us.
_I think I hate Snape more AFTER detention then I EVER could before it. Detention with Snape involves organizing his potions, as well as polishing the cauldrons and re-organizing the closet in the back, with all the ingredients in it.
It's a good thing Snape left the room before we re-organized, or he would've noticed us sneaking things into our pockets.
I had looked up a potion during lunch, so we could get some ingredients for it during detention with Snape.
We were going to make Veritaserum (truth potion!).
"One day," I started, "Snape will realize that it's US sneaking ingredients from his closet, and he'll ban us from detention."
"Or at least detention with HIM." George said.
"Or," Fred said, "he'll find out, and give us MORE detention with him."
"Why would he do that?" I asked, looking up from the potions book. I was trying to memorize how to make the veritaserum.
"Maybe he enjoys our silly pranks?" George asked.
"Maybe..." I said, "But why would he let us KNOW he liked our pranks?"
I already had plans for the veritaserum, but I just added another victim to our list... Severus Snape.