Slips and falls twice on the ice-covered steps approaching the front door.
Right hand is severely burned when he places it on the searing-hot doorknob (which comes from an electric BBQ starter on the other side). Although he puts it out with snow near the steps, it does inflict a painful permanent scar in the shape of an M which was seen in the sequel.
Has his head burned by a blowtorch when he opens the back door, and again, he puts it out with snow, melting his beanie.
Walks into plastic wrap covered with caulking glue and blasted with feathers blowing from a fan, causing him to look like a chicken.
Slips on Kevin's Micro Machines (toy vehicles) at the foot of the stairs (with Marv).
Gets hit in the face (losing his cherished gold tooth) with a paint can while going up the staircase and is knocked off the stairs and crushes Marv (with Marv).
Falls down after tripping on a wire, knocking him unconscious.
Gets hit in the stomach with a crowbar by Marv, who was trying to kill Axl (Buzz's pet tarantula).
Falls after swinging to a wall while attempting to use a rope to cross to Kevin's tree house due to Kevin cutting the rope with hedge clippers (with Marv).
Hit by Old Man Marley with a snow shovel after Kevin's capture (after Marv).
Gets punched in the face by "The Model" after Kevin creates a diversion by pinching her butt (when Kevin blames Harry for the act).
Crushes the roof of a parked car after flying from a seesaw triggered by Marv.
Harry tries to grab a hold of a fire escape ladder which Kevin made all slippery with Monster Sap Soap, causing him to fall to the ground.
A bag of tools falls on him when he kicks open the back door.
His head gets burned with a blowtorch again when he tries to turn on a light switch in the bathroom; then he attempts to turn on the sink, but it doesn't turn on so he puts it out in a toilet, unaware that Kevin had filled it with kerosene, almost blows up the apartment, and comes back out of the toilet with the whole bathroom burned up, along with his head, again melting his hat.
Falls from a sawed ladder.
Narrowly dodges paint cans swinging on the staircase, but gets hit by a pipe and flung to a basement where he is hit again by the same pipe after Kevin cuts the rope holding it (with Marv).
Crushed by tool chest that falls down the stairs (with Marv).
Falls three stories when Kevin sets the rope on fire that he was climbing down on (it was soaked in kerosene) and gets covered from head to toe in varnish (with Marv).
Showered by birdseed from the Pigeon Lady, and gets covered in pigeons, which peck him, and the pigeons' feathers stick to the varnish (with Marv).
Slips on pearls dropped by Kevin (with Harry).
Gets punched across the face by "The Model" after Kevin creates a diversion by pinching her butt (before Kevin blames Harry for the act).
Has four bricks thrown at his face by Kevin from the roof of the apartment, which Harry just dodges.
Gets three staples shot in his rump, groin, and nose from a staple gun on the other side of the door.
Falls through a giant hole into the basement.
Steps into a puddle of Monster Sap Soap, slips, falls on his back, and slides into a big shelf of paint cans which fall on him, covering him in paint.
Gets electrocuted by an arc welder that Kevin connects to the sink, while trying to wash off the paint, making his skull be seen briefly.
Hit on the face by a hundred-pound bag of dusty cement.
Narrowly dodges paint cans swinging on the staircase, but gets hit by a pipe and flung to a basement where he is hit again by the same pipe after Kevin cuts the rope holding it (with Harry).
Crushed by a tool chest that tumbles down from the stairs (with Harry).
Falls three stories when Kevin sets the kerosene-soaked rope on fire that he was climbing down on and gets covered from head to toe in varnish (with Harry).
Showered by birdseed from the Pigeon Lady, and get covered in pigeons which peck him, and the pigeons' feathers stick to the varnish (with Harry).
She pulls a barbell from a ramp, which rolls under the garage door and trips her (with Hughes).
Gets hit in the face with a stocking full of coal.
She gets stuck in a window.
She gets tar dumped on her.
Finn shoots her three times in the butt with ping pong balls using his slingshot. This causes her to kick Sinclair and Hughes hard in the groin and face when they're trying to pull her out of the window.
Mason pelts her with snowballs and knocks her out with a chunk of ice.