BusKill does not ship with destructive triggers.
The current app is limited to locking your screen. Future releases will include soft/hard shutdown. So, by default, your clumsiness would just mean you have to type your password to unlock your screen. Not a big compromise :)
We do have a "LUKS Header Shredder" trigger (which we call self-destruct as it renders all the data on the FDE disk useless), but we (intentionally) don't include it by default and raise the barrier of entry because of the risk of data loss.
We'll be publishing a more detailed write-up on the LUKS Header Shredder in 2 weeks. You can subscribe for updates on our website (buskill.in) or the campaign directly (crowdsupply.com)