Poor Frank Jenkinson; he's homeless, poor and stricken with Invisiblemanitus! What a rough road he's led. The clever homeless sign is pretty hilarious and rather inventive.
Invisiblemanitus isn't an actual disease; however, I'd probably be more inclined to give Frank Jenkinson some money solely for his creative talent and the energy he put into making this clever sign/costume. I wonder what Invisiblemanitus feels like? I'm sure it would be a bit of a weird sensation.