I was using the Facebook app when it decided to freeze. Out of frustration, I clicked the home button multiple times. I got back to the homescreen with VoiceOver turned on ('Triple-click Home' was not set) and a second later, Siri loaded. I tried to take a screenshot, but Siri closed just before the 'flash' took place.
Has anyone else experienced this? Non-jail broken, iOS 5.0 on Verizon.
Update:
I have restored my phone a couple of times since this happened, mainly due to this issue: Audio output and volume controls gone after updating to iOS 5.1
So, unfortunately, any useful information contained in the crash logs has been lost.