The speculation is that Kayla threw something at Nick after the cokestream, cos Aaron said she had done such things before. Is Nick's current explanation that he took a line of ketamine by mistake and passed out, hitting a counter top?
Nick tells on himself. "I don't do that" is very different from "I've never done that". It leaves it open for him to be shown to have done it once and for him to then say he didn't lie.
The timing is going to be interesting. I'm starting to think the reason why Nick was so desperate to know when Keanu last spoke to April is because this happened the backend of last year, when Nick and April seemed to be under the influence, but after Keanu snaked April. So perhaps April knew and Nick was trying to figure out if Keanu also knew.