Anyone for a Highland Fling?

Yesterday I spent 17 hours in hospital with my son who was getting an operation on his ankle - so he's now out of action for 3 months.  I was thinking how frustrating that must be not being able to take part in exercise when I jumped out of bed this morning for a quick and short run, just to make sure the legs were working for the weekend - more of that in a minute.  At 6.06am it was 4 degrees outside but the sunniest day this year, it was beautiful.  But the last couple of miles were slightly uncomfortable as I'd forgotten to go to the loo before leaving.  Palates on the move (cheek clenching!) I call it but fortunately I made it, just!
I also received a call yesterday to say my services were needed for the Highland Fling on Saturday.  This is a 53 mile ultra marathon on the West Highland Way, Milngavie to Tyndrum.  I am part of a four man relay team therefore doing a half marathon cross country.  Not exactly the preparation I would have put in had I known I was definitely doing it but it should be fun.  I am running the last section (Ben Glas to Tyndrum) which is stunning scenery so I am really looking forward to it.  So another easy day tomorrow to conserve my energy.