Fred, somewhere inside the haze of his brain going haywire, noted that it was distinctly unfair to be invisible in a fight. James had managed to move and get him into the lift before he had realised that his opponent had even moved, and he could hardly react in time do throw a curse. As soon as he recovered his balance though, he spun around, this time not about to give any warning.
"Stupef--" If James hadn't lifted the charm before Fred had started turning around, he probably wouldn't have been able to stop himself from throwing the curse. As he stopped his spellcasting though, he felt another wave of shock - this time, less panicked - at the sight of a friend, which managed to somewhat focus his thoughts from their flying in every direction.
"James," he breathed, relieved, "I'm glad you're here, we've - they took George, he's - I - we - HOW LONG DOES IT TAKE A FUCKING LIFT TO GET DOWN?!"
Thinking about the situation only caused him to relapse into his hyperventilating, crazed state.