How to (not) do hill runs

I showed up for running training tonight with the Bolder Options crew and had this discussion with the trainer:

Me: Can I have a workout where I have to run down the hills harder than up, because my night leg of Ragnar is all down hill
Her: Oh, you have a race on Friday.  You can't run.
Me: Just the down hills?  I can walk up.
Her: No.  You can't run.  Just walk.

I was torn between wanting to still run downhill and being super happy about not having to run up that stupid hill tonight.  My head hurts.  My back hurts.  I want to sleep.  I entertained myself by taking pictures with my iPod while I was walking.  There was no wind at all.  I've never seen the river so calm so late in the day.