How about speed work on a snow bike?

Tonight I went out on the snow bike on a firm-ish snow machine trail and did intervals for an hour.  Why? I don't know, I was a little bored and had only an hour. On my HR agenda I'm apparently also "supposed" to do intervals now a few times a week.  My top speed was a wild and crazy 12 mph... downhill.  My slowest speed and highest HR was an uphill 3 mph.  The temp are back down to a reasonable -5. It was painful and a few times I was kind of nauseous. It felt weird and oxymoron-ish on a snow bike but having a short intense ride helped me feel better in the end.

This picture has nothing to do with what I wrote but I didn't take a camera this evening.  I love the endearing banana pet.