I haven't been able to find the Wawrinka meltdown that won him the 2010 crown.
How about Vera Zvonareva's racquet tantrum? She was getting routed by Stosur in Charleston and she finally got the frustration out by swinging her racquet, smash it and to end it all, she kicked the racquet under the couch if I recall. Aedra should be able to verify this as she was covering for TAT.