Rock opts for the pillar - a good middle-ground, really. Demons seem to be rather powerful and agile, with plenty of tricks up their sleeves, so maybe not too many will be hurt by the collapse. He does worry a bit, though - the cloaking device would only work for him, and they didn't have enough for Rush.

Granted, Rush has always been good at showing up in the nick of time, but they've never dealt with demons before!

Once the mine is placed, Rock starts moving as far as he can from it while counting down the time left on his disguise. Once it's gone, it's explosion time...