"Oy mate what the heck are you doing?" Peter had rounded the staircase just as Tristen appeared. Tristen backed a few steps.
"Its useless there's nothing we can do for the others. We have to get out of here with who we have."
"Aye I know that, " Peter said "but we can't have you running off like that it's a risk to the group. We have to stay together mate." Tristen looked like he was about to say something but whatever it was it was cut off immediately as a spell blast hit the air between them. Both boys dropped, flung in either direction.
Tristen rolled to his feet first his wand drawn. Peter never made it to his feet but he had his wand drawn pointing already at the death eater. Both boys shouted. "Expelliarmus!" Their was a bright flash of golden light, it traveled like electricity from one wand to another growing in strength then blasting the death eater full force. The death eater flew all the way down the steps and crashed onto the floor below. Peter heard shouts from below. More were coming. Peter jumped to his feet and the sleeve of Tristen's pajamas.
"What the hell happened...?" he mumbled.
"Aye, mate I wish I knew that was bloody mad!" The boys rounded a corner into the room of requirement and into the curious stares of the students inside. They all had worried looks on their faces even Kale. Peter ignored them and walked over to a near by wall picking up one of the bundles with his right hand (the one not carrying his wand) and slung it over his shoulder. He then said in the best most confident voice he could muster.
"Okay mates, lets get movin. We can't stay here."
Spoiler
so in case you're wondering I noticed that Peter and Tristen have the same wand cores so I used that for like a super powerful expelliarmus charm.

