I've always wanted to make something like that, but the way I thought it up was it would just quickly suck up anything within a given radius and the people/vehicles that got sucked up would smash into each other and kill each other on impact
/eastereggexperimentalBKTcreatorscustomcheapassnegativeimpulseRPG
Doesn't the XM25 do something close to that?
Also-
yes, programmed grenade self-destruct timer. 'Also' what I see nothing
...bahh, I'm just going to get a file package ready, give it to the public and host some boss fight thing with bkt weapons sometime this weekend.