Absolutely agree. Yesterday my colleague and I had to work on something with very hard deadline.I emailed my team explaining that we won't be available for call

Absolutely agree. Yesterday my colleague and I had to work on something with very hard deadline.I emailed my team explaining that we won't be available for calls,emails or anything else. In just 4-5 hours I've done more than it would otherwise have taken me a few days to complete.There were lots of missed calls though:)