use an elliptical bubble instead of a cloud-shaped one. Often, non-human characters such as Snoopy and Garfield "talk" using thought bubbles. They may also be used in circumstances when a character is gagged or otherwise unable to speak. Another, less conventional thought bubble has emerged: the "fuzzy" thought bubble. Used in manga (by such artists as Ken Akamatsu), the fuzzy bubble is roughly circular in shape (generally), but the edge of the bubble is not a line but a collection of spikes close to each other, creating the impression of fuzziness. Fuzzy thought bubbles do not use tails, and are placed near the character who is thinking. Thought bubbles are sometimes seen as an inefficient method of expressing thought because they are attached directly to the head of the thinker, unlike methods such as caption boxes, which can be used both as an expression of thought and narration while existing in an entirely different panel from the character thinking. However, they are restricted to the current viewpoint character. An example is Alan Moore and David Lloyd's V for Vendetta, wherein during one chapter, a monologue expressed in captions serves not only to express the thoughts of a character but also the mood, status and actions of three others. Other forms The shape of a speech balloon can be used to convey further information. Common ones include the following: Scream bubbles indicate a character is screaming or shouting, usually with a jagged outline or a thicker line which can be colored. Their lettering is usually larger or bolder than normal. Broadcast bubbles (also known as radio bubbles) may have a jagged tail like the conventional drawing of a lightning flash and either a squared-off or jagged outline. Letters are sometimes italicised without also being bold. Broadcast bubbles indicate that the speaker is communicating through an electronic device, such as a telephone, radio or television, or is robotic. Whisper bubbles are usually drawn with a dashed (dotted) outline, smaller font or gray lettering to indicate the tone is softer, as most speech is printed in black. Another form, sometimes encountered in manga, looks like an occidental thought bubble. Icicle bubbles have jagged "icicles" on the lower edge, representing "cold" hostility. Monster bubbles have blood or slime dripping from them. Colored bubbles can be used to convey the emotion that goes with the speech, such as red for anger or green for envy.