Making your own homemade submarine is a very bad idea indeed. Today's video is on the most dangerous homemade submarines ever made. The Top Fives original show brings you informational and entertaining top five videos! Join us and subscribe for more. Several segments are licensed. Follow us on Facebook! https://facebook.com/topfivesyoutube Note: The videos featured on the Top Fives channel are for educational and informational purposes. If you have a good idea for a video, leave us a comment! We try to read each and every comment made.