I've seen video of glass walkways and glass bottom pools before.  No thank you.  I wouldn't say I am scared of heights but I don't enjoy them.  So I would most likely choose a different activity for the day then walking across a glass bottom bridge.  But this is just nuts!  A glass bottom walkway that has the "fun" effect of looking and sounding like it is cracking beneath your feet.  F-you and everything you stand for person who invented this!!!!!!!  No thanks, I'll pass...........