Or how many times can you roll the same skill in the same round?
In a recent forum post there was a reference to mounted combat. The horses were all fast moving, galloping around and their movement rates were huge, in the order of 400′ to 500′ a round.
This is partially a problem with 10 second combat rounds. If two combatants were in melee range at the end of round 1, eg the clash of lances in a joust then 10 seconds later they could be 900′ apart (500′ + 400′). Try using a battle map for that! I for one would need a bigger dining room table.