I lost the pilot's side window of a rented C152, south of Ipswich, one evening about twenty years ago. It had been kept on with speed tape alone, which seemed to do the business until I was startled by (i) a loud ripping noise; and (ii) my laminated VFR half-mil of Southern England and Wales whistling rapidly out of the orifice thus created.
If you come across either of them, let me know.