Meet "Bumper"

[bubblepuffer]

U might see your porc to puff from time to time. Porcupine puffer known for the behavior that they like to practicing puff up. I seen mine doing that couple of time already. Mine especially love to puff up when seeing me around the room on the computer and didn't give attention to him. He spit water to the tank top. if still not getting attention, he puffed.

I asked the Puffer Forum, and it's normal behavior for Porcupine puffer to puff up for attention.