Almost nothing bad happens

The pair reach their IT class, to their surprise it isn't locked, Sam quickly ran inside and retrieved her phone.

"There, panic over" Sam said cheerfully

"Well...it's not over..." Anna said, following Sam back to the stairs

"Oh come on, you're not saying you're hating being naked are you?" Sam chuckled, placing her bag on the railing

"I am" Anna groaned, watching Sam open up her bag again, trying to find room to place her phone.

"You totally aren't...you're into it...aren't you?" Sam winked, finally putting the phone away and zipping her bag up

"No I'm no-" Anna started, but was cut off when Sam's bag tipped over, falling off of the railing and down the stairs, straight through the gap...all the way to the bottom floor

"Fuck...fuckfuckfuck..." Sam yelled, running down the stairs as safely as she could, Anna close behind