The Autobot Cliffjumper wields the fearsome glass gas against his foes. It coats his foes and alters the crystalline structure of their component metals, making them as brittle as glass. Cliffjumper is always pleased with the gruesome result - as long as he remembers to stay upwind.
Marvel Comics continuity
When searching for the Dinobots, Cliffjumper somehow used his glass gas to actually transform a human boat INTO glass.
When Cliffjumper winds up in another universe and is forced to team up with the local Decepticons, Starscream gains Cliffjumper's aid in replicating the glass gas formula, so that they can use it on the Ark. After finally learning to trust these Decepticons, Cliffjumper sprays the gas all over the support beams for the platform, causing it to collapse, leaving it ruined.
Cliffjumper first used his glass gas in vehicle mode, firing a burst at Laserbeak's remote-flying laser cannon after the Decepticons caught him and Hound spying on them. The cannon was destroyed in mid-air. It's a gas!
On another occasion, Cliffjumper released the gas (underwater) to shatter the wall of the Decepticons' undersea base, allowing him to rescue the kidnapped Sparkplug Witwicky.
Later, he somehow used the gas to form a solid sphere of glass crystal around Megatron. Unfortunately, Megatron shattered it like, well, you know.
- ↑ Cliffjumper's Classics profile in the Transformers Collectors' Club magazine issue #17