1) Let the Rogues join
Barry, Cisco and Caitlin stood in front of the Rogues, questioning their life choices.
"We're going to regret this, aren't we?" Cisco muttered under his breath.
2) Insult Cisco's shirts
"Why must you always wear such ugly clothing?" Hartley asked, giving Cisco's 'keep calm and don't blink' shirt a look of distain.
"How dare you, "Cisco huffed, taking offence. "These are masterpieces!"
Hartley frowned as he glanced down at the shirt again. "They're stupid."
3) Use dangerous weapons inside
For some reason a thick layer of ice was blocking the doorway to the kitchen so Mick decided to use his heat gun.
That was until Caitlin and Len suddenly started freaking out.
"No! It's not safe to use that in here!" Caitlin exclaimed, followed by Len's shout of, "Are you stupid?!"
Mick raised an eyebrow, his heat gun resting at his side. "How else am I going to get to the fridge then?"
4) Mess with Hartley's gloves
When Hartley was out Cisco decided to play a prank on him.
Taking Pied Piper's gloves from his locker he modified them to emit animal noises instead of the usual ear shattering sonic blasts.
Let's just say Len and the rest of the Rogues got a huge kick out of it during training. Hartley, on the other hand, not so much.