Promotion Ceremonies: How do YOU do it?

I saw a post of somebody getting promoted and saw a few things that the Corps would never allow and that interested me in asking how you were promoted or how your branch of service conducts promotion ceremonies.

For Marines, promotion to Sergeant and below typically have the entire platoon and sometimes company formed up to promote the Marine (even if it's to PFC). These Marines typically do not get any say in how they want to be promoted. SNCO's (Staff Sergeants and above) and Officers typically get promoted with just SNCO's and Officers but this varies and many times it's up to the SNCO/Officer what they want, and Ive seen them be very seclusive especially for more senior ranks.

Our rank insignias are made of metal and we wear one on each collar. Marines are typically given the options of selecting up to two individuals to pin them on. Your'e not suppose to smash the spikes (hazing) of the rank into the collars of the newly promoted Marines, but it's a very common practice.

I was always told (by tradition) that the rank should not be readjusted to conform to Marine Corps orders until the following day and that if it's tacked on crooked, it remains that way until tomorrow.

Wet downs anybody? Promoted in combat? Ive been around a few promotion ceremonies involving other branches of service and even had the honor of promoting an Airman. Some have velcro patches, sewn on patches, some type of sleeve that's fixed to the chest, etc... Some do it outside, some inside. Some need flags posted and there are ceremonial things that are required. Tell me!