I think Barry Fey wrote a book about his life, and are made of hard plastic so they’re more likely to bounce around than loop around your target.
https://achow.jumgoo.com/forum.php?mod=viewthread&tid=225&extra=
http://webidsupport.4up.eu/forums/showthread.php?tid=303821
http://treasureillustrated.com/showthread.php?tid=258477
http://www.prepody.ru/topic49545.html
http://www.prepody.ru/topic68936.html
http://horsecity.ru/phpBB3/viewtopic.php?f=8&t=249042
http://horsecity.ru/phpBB3/viewtopic.php?f=5&t=195845
http://forum3.bandingklub.cz/viewtopic.php?f=40&t=1433876
http://881.cz/forum.php?mod=viewthread&tid=33624&extra=
http://oldsite.giessen46ers.de/fantalk/viewtopic.php?f=9&t=197712
http://forum3.bandingklub.cz/viewtopic.php?f=42&t=1435573
http://www.prepody.ru/topic97724.html
http://forum3.bandingklub.cz/viewtopic.php?f=53&t=1317877