When 2 or more people are taking a dump in a public restroom... The resulting combined odor, when detected by the olfactory glands of anyone present causes them to see a "brown flash".... Similar to a nuclear criticality ....both are caused by a critical mass of "PU".
Pete is no longer allowed to poop in our restroom when someone else is already in there...he has caused too many people to experience a shiticality induced brown flash due to his high fecal enrichment.
In MOBA games, shotcalling is when one calls out everything that's happening on the minimap, their teammates, and especially enemy activity. It is usually the teammate playing the tank role that does a shotcall.
Shotcalls are important, since they let the entire team know about the opponent, what their plans are, while also notifying the team's status; therefore each member of the team is notified of everything that is happening that they might have missed. This also helps the team make right decisions on what to do next.
Tank: "Their jungler is on the buff, one of our sidelaners is retreating and our jungler is not yet prepared for the teamfight."
Mage: "Fighter, what are you doing??!! We are not yet ready for the teamfight!"
Fighter: "I can do this, all of you are nearby"
(*Fighter initiates teamfight; Mage and Tank have no choice but to join in as well)
(*The team loses teamfight due to unpreparedness and ignorance)
Jungler: "Why did all of you die?!!"
Mage: "Because our arrogant Fighter here did not listen to Tank's shotcall."