If i stroke Oodie on his sleeping perch I'll occassionally get fuzzy head, a bit of pinning and a few half-hearted lunges/nips.  Fair enough and fairly obvious really, it's his space and he's not in the mood.

The odd thing is that  whilst he goes in and out of 'pin eye' mode (its like he's trying self control) he lifts his foot to his mouth like he has an invisible peanut.  If you give him your finger to hold he grips hard, pulls it to his head and just holds it there.

Weird....

 This is generally a stressy stance, pretty common with most birds, but like I say usually means they may be a bit stressed and either wanting to be left alone or wanting something they cant get too (You need to see in what situation he's doing it to know).