The Jimmy's Shot

The Jimmy's Shot is a glitch in Doom (2016) that allows firing either of the Combat shotgun mods without triggering the recharge timer.

Requirements and execution
The only requirement for this glitch a combat shotgun with either of the two modifications equipped. The glitch can be performed independently of any upgrades present on the modifications.

To execute this glitch, one needs to follow these steps:
 * 1) Hold down right mouse button to charge up the modification;
 * 2) Punch by pressing F;
 * 3) While the punch animation is playing, hold down left mouse button;
 * 4) Continue holding down both mouse buttons until the shot is fired.

Tactical analysis
While removing the regular recharge timer, this glitch has its own recharge timer that is, however, shorter than even the upgraded recharge timers on both the modifications. If the player attempts to execute the glitch before the timer is over, the shot will not be fired.

The recharge timer can be spent by switching to the rocket launcher and firing a rocket, providing for a useful early-game combo. It should be noted however that if the player is too quick with the combo, they can attempt to execute the glitch before the timer is over (as can be seen in the demonstration video), so a certain amount of pacing is required.

Unlocking the Speedy Recovery upgrade for either of the mods will reduce the hidden recharge timer for that mod, allowing executing the previously mentioned combo without any restraints.

Trivia
This glitch was discovered by speedrunners jimmyla and ALLUPPERCASE, with the glitch being named after the former.