Had that happen. Clear, flat-bottomed cup. First sound was a rather musical "ping", rather than "crack". All heads in the office turn towards that unique sound, trying to figure out what happened. We didn't know until I picked up the cup, leaving the bottom behind (cracked around seam at bottom of cup).
(no subject)
Date: 2008-05-14 10:25 pm (UTC)That cup was Pyrex (but not labware grade).
(no subject)
Date: 2008-05-15 03:45 am (UTC)