A little trickery
The chains are blunt - any performance involving chainsaws usually uses blunt chains. The high-speed steel against steel should be enough to spark loads and look cool without being especially dangerous.
(
Tribs 🦇 ↓ dn ʎɐʍ sᴉɥʇ ↓🦇,
Tue 11 Jan 2011, 20:47,
archived)
And by blunt he doesn't just mean old and knackered.
The chains are just chains, they have no blades.
(
LordManley twitter.com/LordManley,
Tue 11 Jan 2011, 20:56,
archived)