A sail for my DH's cedar strip hand made Kayak and Canoe he made. Was definately an experience. Also have made "shade drops for the awnings on our travel trailer and now for our motor home. ( the sort of fabric they use for umbrellas that let the air thru but offer some privacy) I'm sure that over the years there have been a lot more strange things that I have made, but these two items come to mind first.