Trot up to my science officer astride my pony and say 'Mister Barnes, report' in an authoritative voice. And he would have to respond without bursting out in laughter.
Now picture that situation with Picard on the pony and him riding up to Warf and asking for a report.
For the grand finale, imagine the surprise on the faces of the Borg as I ride by on my pony, dual phasers blazing! Then we rear up and I shout 'FOR PONY!' and the shockwave of awesome from that causes the Borg Queen to drop dead right there.
Sadly the first thought that popped into my head when i read this was i'm glad i'm not on your ship when your pony takes a dump on your bridge >.>