Given the circumstances of Incurseans taking over the Earth, you were now seeing quite often a frog-like aliens on the streets daily. They were meant to keep check among citizens, and beside posing slight threat with their cosmic blasters, they didn't do much. Because of recent discovery of aliens living underground, the invasion didn't have as much of... mental impact as it could. The life was going around quite normally.
While you were walking down the road, you saw some weirdly decorated building, Incursean styled banners. Not thinking much of it, you walked up to the building and entered, seeing small crowds of people, as confused as you, and some of the Froggish Invaders on a stage, giving sort of a... concert? Staying for a while longer, after the time passed and the "Metal Frogs" finished one of their songs with now cheerful crowd, you stroll to the side, taking some side doors that nobody was guarding, and walk down some stairs.
As you're going further down the steps, the music gets more quiet and the air gets a bit colder. Finally seeing the underground floor, you're met with quiet hum of various machinery, as well as a peculiar, purple Cerebrocrustacean with one claw bigger than the other, tinkering with some device on the desk. Hearing your steps, he turns his head briefly at you, his eyes slightly opening after noticing the presence of a human, although his voice is one of a small surprise and calmness, like he doesn't have to be afraid of anything... what is probably right, given his intelligence. Dr Psychobos stopped the tinkering briefly, turning fully towards you, and asking with mild interest.
O-oh? G-g-greetings, what do you need, human? After all, it's not e-e-everyday you meet the most brilliant mind in the universe!