Tapetum Lucidum
Using a reflective wall in a game to give one shot two chances to hit is called a double-tapetum lucidum.
Using a reflective wall in a game to give one shot two chances to hit is called a double-tapetum lucidum.
Bill Nye, perhaps best known for his children's educational series Bill Nye the Science Guy, wearing the same lab coat as in 200: Bill Nye, beats an unseen player (presumably Randall) in an online multiplayer game resembling XPilot, in which players pilot spaceships using simulated rocket physics and attempt to shoot and kill each other. During a laser battle, Bill Nye provides a scientific explanation for the tapetum lucidum, the layer behind the retina of a cat's eye. He explains that the layer reflects back some of the light that passes through the retina, giving it a second chance to hit the retina again. This allows a cat's eye to capture more light than it otherwise would, and thus improves their night vision. It's also why cat's eyes appear to glow in the dark.
At the same time, Bill Nye's battle tactic in the online game perfectly analogizes the point he is making. His spaceship is firing energy pulses into the path of an approaching ship in an attempt to destroy it. Due to the difficulty of hitting a small, fast-moving target, it's likely that most or all of these shots will miss. However, because Bill Nye is firing at a reflective wall, each shot that misses bounces back into the path of the opponent's ship, giving it a second chance to hit the target and effectively doubling the density of the firepower. With double the number of shots to avoid, the opponent's ship is hit and explodes. This explanation is similar to how Bill Nye would explain scientific concepts by using analogous demonstrations of other things.
In the analogy, the weapon shots fired by Bill Nye's ship are the light photons entering the cat's eye, the reflective wall is the tapetum lucidum, and the opponent's ship is a retinal cell. Destroying the opponent's ship with a shot is analogous to a light photon being absorbed by the cat's retina (and therefore seen). If the reflective wall hadn't been there, the ship might have survived, which means the retina would never have seen that photon.
Randall presumably considers this "extra infuriating" because Bill Nye is showing both his scientific knowledge in some other field and his gaming prowess simultaneously, while he lacks the skill even to win the game normally.
The title text is a pun that refers to "tapetum lucidum" and uses "double tap" in the way that online games, memes, and films refer to shooting something twice in rapid succession to ensure its demise. This phrase is used in the film Zombieland, and is the subtitle of the 2019 "Zombieland: Double Tap" sequel.