I wish I'd thought of climbing up a tree whilst I was doing Teacher Training. The various loons in charge would have absolutely loved it. (Mind you, some toe rag would no doubt have attempted to cut it down with a stolen chain saw)
I can just see it now. Me dressed up like Robin Hood, precariously balanced on a swaying branch 30 feet up, armed only with a megaphone (and a bow and arrow to ensure discipline). Eventually though, I wood probably have had to bough to pressure from the Head to come down as the kids ran riot below; ignoring my attempts to conduct a Science Practical from my leafy lab. (What the Health and Safety people would have to say about the whole thing doesn't bear thinking about.)
Anyway, Mr Buth gives regular updates on his arboreal adventure here
I just spent my time climbing up the walls.