Improvised Umbrella

It's raining and you don't have an umbrella? What do you do? Grab the nearest items, fashion something out of them, and you have yourself an Improvised Umbrella.

Occasionally, a big leaf or a newspaper will be used for this purpose, and don't be surprised to see someone use a (empty) garbage bag as a raincoat, as all three are Truth in Television.

Examples of Improvised Umbrella include:

Advertising

In an advert for Kellogg's Crunchie Nut Cornflakes, a guy walking into the rain with a laptop and a box of cornflakes put the cornflakes into his laptop case to keep them dry, and then used the laptop as an Improvised Umbrella.

Anime and Manga

The rain spirit from Urusei Yatsura uses an oversized leaf, and so do the traditional spirits on which it's based.
In My Neighbor Totoro, Totoro uses a big leaf at one point.
In Change 123, during the Okinawa school trip, Kosukegawa and Motoko get lost in the forest, and so Hino and Tsukishima go out to search for them. As it's raining, they put on themselves improvised raincoats made from transparent garbage bags, which even have the word "garbage" written on them in huge katakana characters.
Fullmetal Alchemist: a Flash Back revealing May Chang meeting Shao May for the first time had the former holding a large leaf as an umbrella in the rain.
Brock's infamous "Drying Pan" from Pokémon: Mewtwo Returns.

Comic Books

Sue Storm of the Fantastic Four has used her force fields for this purpose.
- During Civil War, Johnny Storm is shown using his power this way.

Fan Works

The Teraverse superheroine nun Sister Marie sometimes uses her telekinesis to shield herself from rain. In one scene, involving an outdoor rescue during a rainstorm, she wore a raincoat anyway, because it had been offered to her, but didn't bother putting the hood up.

Film

The Rocky Horror Picture Show: Janet uses a newspaper this way. As do the audience.
A man is briefly seen at the beginning of Squirm running through a thunderstorm using a newspaper as an umbrella. Mike and the bots joked that he was the hero of the film, and at the end of the movie wondered what happened to him.

Literature

Circle of Magic: Tris has been known to use her weather magic to create an area around the group where rain won't penetrate. Of course, she loves the rain; she makes the barrier only because her friends don't want to get wet.
1632: In 1635: The Eastern Front, Jeff Higgins resorts to using a wooden plank, and Prince Ulrik (of Denmark) and Princess Kristina (of Sweden) use a dining table.

Live-Action TV

In and episode of Friends, Chandler was out on Monica's balcony smoking when it began to rain. When everyone refused to allow him back inside with his cigarette, he picked up the lid of her charcoal grill for an umbrella.

Newspaper Comics

Dilbert manages to make an improvised raincoat by making holes in a garbage bag.
In one Sunday strip of For Better or For Worse, Elly finds herself stranded at a department store in a rain shower with no jacket. Thinking quickly, she fashions a rain jacket and hat out of garbage bags - only to find that by the time she finishes her project the rain has already stopped.

Video Games

Metroid Prime 3: Admiral Dane is so badass that in the Space Pirate Homeworld, where the rain is acidic, he uses his personal flagship as an umbrella.

Web Comics

In PS238, Guardian Angel's power of 'protection from basically anything and everything' also protects her from rain, whether she wants such protection or not. It appears as if the rain is hitting a spherical energy shield... and for that reason, she always has to bring an umbrella when she goes out in the rain, to avoid revealing her secret identity.
Schlock Mercenary had Chinook use one of Oafan super-freighters 8 km in diameter that can split into two hemispheres and are absurdly expensive just for construction material alone as "a pair of mountain-sized, armored umbrellas".

Western Animation

Ed, Edd 'n' Eddy: Lee Kanker is used as one by the other two Kanker sisters.
Gwen Tennyson makes her own out of her glowing pink energy shields.
According to a Cutaway Gag on Family Guy, Mary Steenbergen uses Ted Danson's forehead for this.
Avatar: The Last Airbender: Water bending was shown working this way in "The Fortuneteller", and then again in "The Southern Raiders".

Other Media

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Real Life

Common in Real Life, too, though not to the degree it's shown in fiction.