lazy, I hope that you are feeling OK. I don't know much about the legalities of sectionning, though I have been sectioned twice (I had two bouts of psychosis). I really feel for you having to go on a ward, even when I was totally bonkers it was horrible.
I agree with the boredom, I took up smoking(don't recommend that). I had not only shit jigsaws but woodwork...sounds good? that was until we realised we werent allowed tools so we glued together pre cut balsa wood!
Now, I know nothing about your situation but I didn't know I was ill until months afterwards, I spent months convincing my psychiatirst I was normal, only to be taken off meds and then running around til I got re-sectionned.
that doesnt mean I don't believe you aren't ill, just that it is very hard to judge from what someone is saying (either way).
If you have to go in again I will be thinking of you. Try and make friends with people, I met some amazing people.
if the boredom gets to you start a 'I am the resurrection' conversation in the TV room (always good for a laugh...we had 3 jesus'es 2 gods and 1 buddha )
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seriously speak to your legal advice, see what they say, if you don't have any MH probs I'm afraid your best bet is to go along with all the bullshit, play ball do the stupid jigsaws and say how much better you feel. If you do realise you have MH probs the advice is exactly the same.
good luck x