From www.wdwinfo.com

Fish tank breaks open at Downtown Disney's T-REX Cafe
Mar 18, 2014

During the dinner hours last night, a large fish tank in the middle of the T-REX Cafe at Downtown Disney broke and water started pouring out the side. Employees began moving patrons away from the tank, but one guest was able to get some of the incident on video. The tank cracked down the side and water began pouring onto nearby tables. Landry's Inc., the owner of the restaurant, has not yet commented on what caused the fish tank to break.