If anyone is up to the task, it would be cool to check the elitistjerk forums for any research on Thrash. As a tank, I've personally ate 5 simultaneous attacks from Lord Sanguinar during the Kael'Thas fight. Last night, I witnessed our main tank die to Morogrim Tidewalker from 3 normal attacks all on the same time stamp.

The addon I use is called GrimReaper, which is a part of XPerl. GR shows timestamps, damage, healing, crushings and crits, and damage types all within every players' tooltip. GR is not download-able apart from XPerl, but you can simply copy the GR folder into your Interface/Addons directory and it works just fine.