Here's my attempt at punctuating it. For obvious reasons I'm not sure if this is what he meant.... I haven't changed any words.
How about the fire command, then? Grab the bomb with the nearestObject command then, if needed, you can perform some setVelocity loops to get it to go down and hit where you want it to. I'm not sure how you would do this, but it would be possible that way.
An alternative, although the meaning is not substantially altered. However this version involves starting not one but two sentences with 'Then', which is worse than farting in a lift.
How about the fire command? Then grab the bomb with the nearestObject command. Then - if needed - you can perform some setVelocity loops to get it to go down and hit where you want it to. I'm not sure how you would do this - but it would be possible that way.