A Big Entrance is Exactly What It Says on the Tin. An entrance so over-the-top and so cool, ensuring that every character's eyes are on that entrance, that the entrance itself merits its own entry on the Moment of Awesome page.
The absolute most important things in the entrance are that the entrance itself has to be loud, it has to be overly dramatic, it has to catch the attention of all characters present, and it has to be cool. There are many other tropes that can help achieve this, including, but not limited to...
Big Damn Heroes: Because if someone is going to save everyone from the Monster of the Week, they're going to have a dramatic entrance.
Dynamic Entry: When the entering character has their foot buried in another character's temple, you can be damn sure you have everyone's attention.
Grand Staircase Entrance: Often understated, but no less awesome, when someone descends from a great staircase.
Hammy Herald: Why chew the scenery when you hire someone to do it for you?
Incoming Ham: Adding a hammy, memorable line helps a lot.
One-Liner: Occasionally, they help.
Power Walk: When done right.
Running Over the Plot: As character introductions go, either running someone over or being run over is extremely memorable.
Super Window Jump: With the loud crash and broken glass falling like rain, it's literally impossible to make this kind of entrance without being noticed.
Theme Music Power-Up: Often playing in conjunction with an Unflinching Walk, Three-Point Landing, There Was a Door, Power Walk, or Dynamic Entry.
There Was a Door: It's really hard for your entrance to go unnoticed when you make your entrance by smashing through the wall.
Three-Point Landing: With entrances involving a great height, this helps to say "nothing can hurt me."
Unflinching Walk: Only when walking into a situation.
The diametric opposite of the "Stealth Hi" in a Stealth Hi/Bye.
Although many Dynamic Entries are part of this trope, not all are. A dynamic entry is an entrance plus violence. This trope is an entrance plus drama/awesome (violence optional).
May become an Establishing Character Moment. Contrast Jobber Entrance. Not to be confused with Big Door.
One Sub-Trope of this is Crash in Through the Ceiling, which is for when there's a loud entrance through a ceiling.
