This is a method for boosting online, though can be achieved solo with a bit of luck.
Create a Standard Xbox Live Player
match and invite your boosting partner in, now one of you needs to select Yoshimistu
(Purchasable from the Character Creation
menu for 4000Gold) it doesnt matter what character your partner chooses. now pick a location with no edges so you do not get any Ring Outs.
Once the match begins have your partner get you to around 15% health
, then do the same to your partner.
Once both of you are at around 15%
health distance yourself from your partner, once far away begin running towards your partner as you get close press and hold +
Yoshimistu should now perform his Suicide attack which will impale both you and your partner, achievement unlocked.Tip: Set the match to a few rounds to give you a chance to get it right
Here's a video to demonstrate - Please note the video is made via local co-op so the achievement does not pop.