Konjiki no Gash Bell!! OST 3 - 23 - Harsh battles 

I think of Bari when I hear this OST. His immense and powerful aura when he fought against Ted

Worst case cenario: You and your mamodo were both tired from a harsh battle, You have little to no heart power left and these guys come up and start charging energy to attack you.

Momento epico

Worse than that: YOUR FAUDOS FREAKING LOCK