When adding slow motion to your game, you must adjust any timers you have in your game to the percentage of the speed of the world. You can use (WorldSpeed/100) * Timer and use the delay input to update the timers value.
This example was made after the video called "Stop for Big Moments!" made by Masahiro Sakurai.
This helps portray impact in a scene, like for when a player is hit or when defeating a boss.
This is created by pausing the scene with camera shake, and then slowing the physics speed (or slowing all objects in the game) and a slower camera shake.
This was copied from another Example I had for showing how to make a Homing Missile.