BPs don't rely on vision to identify things. (neither do most other snakes) BPs have heat-sensing pits that they DO rely on...striking a cup of coffee was
probably NOT about "fear" but about hoping that warmth meant dinner was nearby & needed catching! Expect more of the same, anytime you wave your
warm appendages around him...snakes aren't the only ones that make mistakes, you know?
Most snakes have poor vision; they go after motion but don't actually identify things that way: they use scent, heat-sensing pits IF they have them, & touch.