What is the most unlikely physical situation in which you have composed or written a poem?

Philip Wells negotiated the sleeping policemen of Hampstead Heath whilst writing ‘The Rock-Me Timing Bang’ on the steering wheel of his ageing black Golf, though you will be pleased to hear he did stop the car to finish writing! Benjamin Zephaniah was stuck in a lift with a drag queen and a homophobic, claustrophobic weightlifter. Chase Twichell told us her most unusual place was in a secluded fifteenth century castle hotel in Kitzbuhel, Switzerland, where she wrote by candlelight for two days whilst the power was off! Glyn Maxwell composed ‘Either’ in his head whilst wandering the hills around Lumb Bank in the pouring rain.
What is yours?