During the work up for my IR at RAFC, I persuaded my QFI, Capt White, a USAF exchange officer and thoroughly nice chap, to agree a PD to Mildenhall one fine Summer's day. All went well until the go-around when we were given departure instructions "fly nnn°, climb to nnnn' call this, squawk that, recall on nnn.n, readback....". I coped with most of it, then asked for the frequency again.
"What? You didn't write it down?" my QFI queried. Whereupon I held up my hand and told him "Sir, sorry, my chinagraph just melted!". He dissolved into fits of laughter and back we went to Cranwell. He lived out on the story for months "They gave us the departure from Hell and my stude's chinagraph melted!"