[ElProximo]

Prediction:
Marcy will make his 'grrrr' face and do his hilarious posture business as David gives him the shout down of his life,
but,
Marcus will certainly storm off and then tell someone 'He's lucky he didn't make me any angrier or else...',
and,
then make a point of going to the diary room where he is safe to really do some damage with no threat of physical retribution and possibly try and get himself evicted by BB and in such a way he was kicked out for being 'too dangerous' and he can be a legend in the toy-painting club about how BB couldn't 'handle him' and how they were scared of what he could do etc etc etc.
Watch for that to happen if it gets rough enough on Marcy.