Wing them right back and add some lemons of your own.
Keep them for ammo against the zombies.
Find someone whose life gave them tequila and have a party.
Genetically modify them and use your Super Lemons to destroy the world!
Make orange juice, sit back, relax, and watch the world wonder how you did it.
Make lemonade... then give it to your enemies because it will be really nasty unless life gave you some sugar too.
Build an air cannon and share your lemons with the world.
Squeeze the juice into a squirt gun and start aiming for eyes.
Twist some of the peel into a martini.
Build a lemonade stand and use the profits from your business to hire an army of MMA fighters. Let's see if life makes the same mistake twice...
Powerthirst: when God gives you lemons, you FIND A NEW GOD!
-- Nope, none of these works for me, I'm adding mine under the Comments.