What's that cool drill powerup and what does it do?

Also, it seems that the AI in the video still doesn't lay bombs except when somebody is beside it. I quite liked the AI of SB5 because it would lay bombs even when somebody was far away because it knew how far its bombs could blow. Maybe make it that way for Power Bomberman based on blast radius too? Actually... now that I think about it, the most fun to play with Bomberman AI so far is SB5's super AI. The one you have to unlock with a password. It's behavior is as interesting as that of a human player and it's quite unpredictable and utilizes items extremely well... Yet it somehow has very human imperfections that don't involve a lack of reflexes.