you may have seen the build your own 'jet powered' bike on ebay or elsewhere" jet powerd bike forget electric and powabyke build this Item number: 220117871170 "
the video is also great. Have a look if you need cheering up. Not sure how to link but you can follow the ebay trail. I do not intend any of you to spend any money and do not mean to give publicity to this 'project'.