Towards the finale of Enemy of the State:
Brill: You're either incredibly smart or incredibly stupid.
Robert Clayton Dean: We'll see in a minute. Watch out for the FBI.
[winks to Brill]
This results in Brill feigning sickness, going outside the van, and allowing himself to be photographed by the FBI.
This strikes me as out of character for Brill, as for the majority of Brill's life he's been avoiding surveillance. I don't think it was necessary for him to do so, in order for Brill and Dean to succeed. Also afterwards, Brill vanishes again.
It seems like Brill should have a strong (even instinctive) aversion to being observed.
Question: Why does Brill go outside the van to be observed by the FBI?