This is how kratom overdose feels like. With classic opioids the more you take the higher you are (and then you die). Kratom is a partial opioid receptor agonist, most opioids are full agonists. It means that there is the limit to the high you can get and it's nearly impossible to die from the overdose. In theory you can choke on your vomit, but you won't stop breathing like you would with the H for example.