[betgo]

I would fold based on the information you give about BB. You were suspicious from his manner he had a big hand when he raised preflop. Someone wouldn't make an effort to appear weak with AK. That sounds like AA/KK.

I would be very suspicious of the accidental large raise. My experience is that bad players or amateur players almost always doing something different when they have a big hand. Like they never just make their standard preflop raise with AA. I wouldn't assume he couldn't angle shoot.