i was on 70hp with GREEN treads then 83 hp with RED treads and there's no damage indication inbetween this (i used spectator pause hotkey to try to go frame by frame)
it literally happened so fast even the computer is unable to display it..........
game: http://www.dotabuff.com/matches/1222341363
time: 10:32
pix: + Show Spoiler +
gank features - bottle before zip, using illusion runes to attack, bottle between attacks, switch int treads at appropriate time, juking out of vision. bonus feature: drow misclicking to low ground (on seeing this i guess i would have gotten wiped in normal circumstance. edit: also i see they had a ton of vision on me approaching)