If a Medium Size Minotaur Knocks Over a Large Dragon, is it Silly, Cool or Both?

a.k.a. Kobold Hall, Part 3

With the kobolds defeated, the rogue found the convenient note and key on the leader.

Area 5 - The True Threat
I replaced the map in the adventure with a long, cold sloping passage into the Frostfell Rift map from Fantastic Locations: The Frostfell Rift to make the terrain more interesting. The party crept in slowly, caught a glimpse of the dragon in the distance, and tried to talk to it, giving it time to circle around behind them. Once the fight was fully joined, the weakening breath seemed to worry the party a lot, especially when it scored a critical on the paladin (frost breath in your face, defender boy). The slowed, weakened minotaur fighter used goring charge to knock the dragon prone. This gave the rogue combat advantage, which she used to hit the dragon with her Easy Target exploit, and that allowed her to keep combat advantage for the rest of the fight.

I want to focus on the goring charge. Here's the relevant text from the minotaur entry in the back of the Monster Manual:
Special: You must charge as part of the attack.
Hit: 1d6 + Strength modifier damage, and the target is knocked prone.

We also have to look at 4e charging:
Movement Requirements: You must move at least 2 squares from your starting position, and you must move directly to the nearest square from which you can attack the enemy.

Slowed simply reduces movement to 2 (still far enough to charge), and weakened reduces damage (and says nothing about extra effects). The text of goring charge says nothing about the relative size of the attacker and the target. So by the 4e RAW, a slowed, weakened, medium-sized minotaur PC can use her goring charge to knock over a large-sized (or even bigger) dragon, making it prone and thus subject to her rogue ally doing Very Bad Things to it.

Analysis:
Realistic, no. Can be glazed over with action-movie-style description, yes. Player glee while recounting the moment repeatedly, priceless.

Are you the kind of DM who would:
1) Point out that even though no rule prohibits it, so many factors are inhibiting this action that you overrule the RAW and let the dragon keep its feet.
2) Run with the rules as written while describing the minotaur, a cloud of icy shards flying off her in all directions, running at the dragon in sumptuously-filmed action movie slow motion and bowling it over with a supreme effort of strength and will.

I'm #2 and fine with it. The player of the minotaur talked about this event almost daily for the entire week after it occurred, and with a grin on her face every time. The charge was probably the turning point in the battle - once the rogue nailed the prone dragon with Easy Target, she kept dishing out sneak attack damage every round while the paladin kept it marked so it couldn't effectively get rid of her. The teamwork displayed was inspiring to watch unfold. Three rounds later, the dragon went down under a pile of massive punishment.