"Don't you think you guys are being cold by starting the party, and then thinking to leave immediately after!?
At least let us entertain you a bit before leaving!"
A sniper's best advantage was being far away from its target, and being able to escape easily from his spot.
Once their spot was discovered, and they were found out they had to leave their spot immediately, because if they were caught by a fighter, they could only surrender.
Well not necessarily always as there might be a lot of skilled sniper fighters, but they were just a minority in the sniper's community, and these guys clearly weren't part of that minority.
The moment they heard those words and turned their heads to look at the people saying those words, they were totally shocked.
Each one of them was, as each one of them had a different person behind their backs, and none of the three was a total stranger to them.