This is sort-of off topic, but want to get some perspective of the same.
‘Which is the coolest/toughest thing/task/functionality that you have implemented using BODI in any of your project’
It can be anything, may be the limitation that you encounter in BODI for some project, and how you made it happened!
You don’t have to dwelve the details, just a gist of it will be just do!
And of course, this is not for interviews, so please do respond appropriately
Thanks,
data_guy 
(BOB member since 2006-08-19)