Brenten has the most fun with any aerosol can he can find. He figured out that the funnest thing to do is hold it upside down and push down onto the button.
This is very effective is discharging every hairspray, shaving cream, or cooking oil bottle of its contents.
Everything was fun and games until he managed to shoot waterproof/sweatproof sun screen into his eyes. Which led to a majorly painful meltdown.
I had to wrap him in a towel and hold his eyes under the sink faucet. Rinse with saline, wipe what came out and repeat. Now he is happy and looks like he has smoked the biggest bowl of his life.