You might be able to prevent this. Assuming your topped off before charge, and have a WHMs protect, you should have been fine. I have yet to die from Charge + Lightning tick, because of Spineshatter and Second Wind, either of these will save me. I do also raid with over 6300 HP and do get down to less than 200 HP if I do eat a tick of the field, so maybe if your HP is lower you won't survive. But do not underestimate the power of Second Wind ^^