Decide to get your bathrooms renovated.
Hire tradesmen.
Once cat has gone out for the morning, have 6 tradesmen arrive at your house all at once and start attacking the bathrooms.
Wait till cat comes back in and sees the 6 tradesmen.
Watch cat freak out and run into the glass in his attempt to get out the cat door quickly.
Try not to laugh at cat.
Hire tradesmen.
Once cat has gone out for the morning, have 6 tradesmen arrive at your house all at once and start attacking the bathrooms.
Wait till cat comes back in and sees the 6 tradesmen.
Watch cat freak out and run into the glass in his attempt to get out the cat door quickly.
Try not to laugh at cat.