Cadance: Oh poor thing, he most be working too long and not sleep well!  
Shining: This is why i tell every guard to sleep in the heur i tell them for not fall in sleep in duty!  
Cadance: But you too a sleep on your duty, remember when your parents a make on duty to watch Twilight befor i arrive?  
Shining: Hey, this is a nothing to do with Royal guards duty! is..Big brother…… duty….I get what you try to tell me…he his family a make foalsitting his little Brother and sister all night?  
Cadance: So you know what he feel, remember, what is arrive when you sleep on duty on the castle, what your mentor do when he fond sleep?  
Shining: Yeah but you a tell him is your fault for not arrive in time and i got foalsitting twilight all night and got low of sleep…..fine i go easy on him.. but only for this time…..Oh? hey he a finish all his works befor to fall to sleep….hmm Good Soldier….i let you go this time but next you fall in sleep on duty, i will make running all round the empire for one hour none stop as full speed and no use of your wings!  
Guard:….eh? CAPTAIN SHINING ARMOR!? I AM SORRY TO FALL TO SLEEP IN DUTY!  
Shining: Is ok for this time, Go sleep on a bed, i want you on duty a tomorrow a 10H AM,Got?  
Guard: YES SIR!(and he go)  
Shining:…….he got good future as guard but he need to work on his sleep time!

first thing i thought of when i saw this: they were early for their marriage counseling session.
 
why was their marriage counselor a member of the royal guard? they don’t get paid very much, he was moonlighting.

it would seem this is based on something that happen to the artist

Shining Armor: If this represents the best Equestria has to offer, I’m starting to understand why Canterlot fell in about ten minutes.

pegasi nap so much because of their metabolism, flying takes a lot of energy so it´s either napping, eating or dying from exhaustion for those poor fellas.

I once caught and scolded a soldier from my Division and was sleeping in duty like that. Plus he also had his uniform messy AND FREAKIN BACKWARDS!!!!

@Kerion
 
And his tail.

He hates checking the bills…

Somepony is gonna be on latrine duty…

He messed-up that bad huh princess? Personally, I would of docked both his pay and his vacation days.

Dont worry guys I talked to shining and that gaurd pony got off easy. One month in the dungeon =)

Some guard is asleep on the job.  
Some guard’s superior just walked in with his wife.  
Some guard is probably in an ungodly amount of trouble.

@sixtyfour: Covering for Shining while and Cadence pop out for a nooner?

What’s that guard pony doing in Shining’s office?

Cadence doesn’t make a good taskmaster :V