I've thought about it, and I decided that I'm going to start the RP as the gang fight is over and everyone is waking up after the black gas explosion, and from there it'll be each character's reaction to waking up, and then a little flashback of what happened leading up to the explosion, so it'd be like this

Sloth wakes up, sloth recalls what happened from getting ready to just before the explosion, and then her gathering everyone up and leaving and then after everyone posts their own version of this we'll move on to the meat of the RP