Mobility, or even being alive afterwards, is entirely secondary to the fact you just pulled off a DFA on a 'Mech with a CV. I can think of no finer way to end up in Valhalla, all shiny and chrome.
I had a quick look at the main rules, and if we go by 'Mech rules for it, the Kanga takes 10 damage using LRM hit clusters (attacker weight divided by 5), distributed across the kick attack location table, in exchange for dealing 15 across a BattleMech's arms, head and torso, in 5 point clusters akin to an LRM (attacker weight divided by 10, then multiplied by 3). Radical, awesome, almost guaranteed to end with you celebrating in the afterlife, but not really worth it in terms of military matters.