Eeeh... no.
Would be tremedously icky and tacky if they did something like this.
Tackier than the vomit after-effects from the /Poison set? Tackier than the repeatedly vomiting NPC in Pocket D? Tackier than the pools of vomit marking the spawn points in D for said NPC? Jus' kinda askin' here.
Just... no.
Disclaimer: The above may be humerous, or at least may be an attempt at humour. Try reading it that way.
Posts are OOC unless noted to be IC, or in an IC thread.
Oh, yes please! 
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How about having a Chance for Vomit proc in melee IO or sleep IO? Would be nice to slot it in a melee attack that targets the gut, or why not the Poison trap in Mastermind Poison secondary. My poison mastermind miss the vomiting effect from the power with the same name in traps secondary.
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