Al discovered the hidden downside to Ed having tentacles, approximately 2.5 seconds after Ed woke up with said tentacles.
Ed was a very expressive person when he was agitated. And he was an easily agitated person. One could even call him a spazz... and now he had a lot more to spazz with.
After the explosions and general mayhem had subsided, Al quietly put in a call to Hawkeye in Central, so that Roy could redistribute the budget for the inevitable damages to his office in the future.
While Al was making his call, Ed realized the hidden upside to having tentacles. Without thinking about it, he'd been multitasking with his alchemy during the fight.
The tentacles twisted gleefully as Ed began to plot.