From the unsupported glass . You can ( in theory ) do what you want . But who wants glass ‘ wobble ‘ if you catch it with your shoulder ( or appendage) ? . In my mind ; better to have it than not ( personally ) . I ‘sold’ it to SWMBO as otherwise … death , broken glass , crippled for rest of life , permanent disfigured etc. etc . . Like a guy trying to sell you BS ( imho ) life insurance. 1 second later SWMBO agreed on ‘arm’ to hold glass . @Thorfun man up ! . Sell what you need to sell !! . Grow some hair around it