I agree, I've seen a Horse running towards me once and it was already intimidating, let alone adding someone with a lance on top of that.
And yes the Romans and the Makedonians were both brutal, can't say so much about the spartans though.
First they sacrifice a goat and start marching towards you with what seems like unison of the entire line with their men singing their warcries and flutes and drumes playing. (this was apparantly very intimidating to see)
If you decide to face them the battle will be hard, if you run however you can run they wont persue.
I think that was important psycological warfare, since their enemies knew that if they would run they would live, yet if they would stand they could very well die (considering the reputation of the Spartans as well).
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