I blagged a flight in a Moth once. Lovely aeroplane to fly and all that but the most uncomfortable I've ever been in. Had a bad back for days after I got out, the seat was obviously as wrongly shaped as it could be for my build.
It was an interesting blag actually. We had taken an E3 down to Marham open day and I was wandering down the static line when I came across this Moth. I got talking to the owner and he said he would love a look around the E3. I said 'Gizza trip in the Moth and I'll show you round' half jokingly. His eyes lit up and he asked when I wanted to go. Ten minutes later we were airborne, me with a silly grin but aching back. Worth it though.