Directly before your door is empty. However, about three paces away you see a young man, roughly your height and age. He's surrounded by wisps of yellow fog swirling around him. He has a small belly that pokes out between the hem of the shirt and the waste of the pants. The pants themselves seem to be straining against the fat. His face obscured by gas mask. Based on his looks you assume he was a little late putting it on. There's something familiar about this guy though. You're certain you've seen his shirt before, but the print is hard to read stretched, fogged and a few paces away.
"Who is it?" You hear your phone yelling at you.
You retrieve the phone before hurrying back to the window. "Some chubby guy in a gas mask."
"Someone we know?"
"It's... hard to tell." You say as you squint through the glass.
The man waves and holds up his other arm. He's holding something large and red and "Fuck."
"Fuck? Fuck what?" come the confused cries from your phone.
"Fuck, that guy is holding a brick and waving at me."
"Is..is he threatening you?"
"Hurry out and bum rush him!"
"Don't you dare go out without a gas mask!"
"Shut up guys, I need to think. What kind of sick fuck goes around doing this?"
"Call the police!"
The guy points at you and waves the brick around.
You'd love to open the window and yell him to get off your lawn, but that would mean inviting the fog in.
Your eyes focus again on his shirt. And then it hits you, like a brick in the head. That's Chad.
"Fuck, it's Chad."
"Chad? Why would that dick come visit you?"
"I don't know." You and Chad were....not friends. Somehow you always seemed to find yourselves vying for either first or second place no matter what subject or sports you were doing. You never minded the competition, but every win would always be celebrated in your face and every loss needed to be excused. The sun in his eyes, he had an off day, you threw sand in his eyes, you somehow tripped him up from the other side of the campus. The list of excuses and accusations was endless and somewhere along the line Chad lost sight of it being just a game. He turned nasty. You shivered at the thought of some of the shit he'd pulled. But why the hell was he here?
"Didn't you say he was chubby?"
Your heart skipped a beat and your skin felt cold. "Yes." You answer silently. He was chubby and he couldn't stand it, he must've come to take you out of the equation!
Shit. You needed to act. Now! If the brick hit your window the fog would come in and you have no way of fixing that hole. You'd be forced to breath in the fog.
"Guys think with me here! What do I do!"
"Take a deep breath!"
"Call the police!"
You could hold your breath, run out and indeed bum rush him, take his mask and brick and hurry back inside before things got worse.
Or wait and retreat in a different room, which you would still need to further insulate against the fog while you hope your friends can come and save you. But who says that Chad would back down after breaking that single window?