OK, I made it 

. If a  

 near  an 

 taunts while in the air (i.e. in jump),  the 

 is healed by some amount, or it's building is advanced by some amount.
The modified sources are at 
github.
To see what has been changed, see 
the diff.
The compiled QVM is available 
here.
If you want to see it in action, tell me (I'm most often at R-Unlimited-CZ) and I'll show it on a private server.