By now, Indy is looking very displeased indeed. He's about to retort...

...when he just stops, mouth half-open, poised to spew forth a suitably firm warning against touching his beloved fedora. A second or two later, his eyebrows raise happily and he blurts something completely different out instead:

"Brody!"

Name inspiration finally hit him. He laughs in the wake of this eureka moment.

"Of course, how could I've been so stupid. It's gotta be Brody."