I have forgotten I'm riding fixed a few times and tried to freewheel, there is no horrific injury, I just got thrown around in the saddle a bit and 'reminded' what bike I'm on. You think 'Oh shit' and get back on with pedaling. it takes a bit of getting used to but IMHO is worth it, have another go and remember you are learning to ride again, you cannot go into it at the same speed as you are riding SS.
EDIT: yes bad weather when the roads are a bit greasy fixed really works well.
I have forgotten I'm riding fixed a few times and tried to freewheel, there is no horrific injury, I just got thrown around in the saddle a bit and 'reminded' what bike I'm on. You think 'Oh shit' and get back on with pedaling. it takes a bit of getting used to but IMHO is worth it, have another go and remember you are learning to ride again, you cannot go into it at the same speed as you are riding SS.
EDIT: yes bad weather when the roads are a bit greasy fixed really works well.