We were recently in the process of installing a toughened 10mm glass panel (2000x900mm)into a frameless shower channel when it exploded. The panel was in mid-air when it happened and had not been knocked at all up to the point of explosion. however there was a long scratch on the glass which the manufacturer had pointed out on its arrival. Because the glass had taken 6 weeks to arrive our client decided reluctantly to take it-could this have affected its strength and cause the glass to explode?The glass company denied this but could not provide us with any other explanation. the customer is now very concerned about the safety of installing a shower screen of this type as they have young children. We have set smaller pieces of toughened glass into our furniture in the past without any problems.