Yeah this one has been making the rounds. I'm pretty sure I visibly flinched the first time I saw it!!!
I thought up several alternative strategies (ranging from bad idea to probably ok); the most fun would be to sit back and take out the remaining blocks with a 30-06... there might be some small amount of collateral damage from that strategy though
On a related note: If you haven't seen any of the Fred Dibnah documentary, its pretty interesting. https://www.youtube.com/watch?v=xuSW9kOBADo - 1/6 - the rest you can find on the youtube.
He shows how to take down slightly larger brick and concrete structures neat and clean as you please.