It's funny you bring this up, here's what he have planned for the next patch:
Get 5 kills in a row without dying, spawn a lightly armored horse archer.
Get 10 kills in a row without dying, spawn a heavily armored horse archer.
For every two kills over 10, spawn an additional horse archer(random quality).
30 kills in a row and chadz spawns on a donkey with a longbow, 550 archery wpf, 11 HA(no riding penalty), 40 riding, and full plate.