They hit you with a big hammer 😉
No seriously they pit a small cannula in your hand (well this is what I had) a nice nurse does that and speaks really nicely to you whilst doing it, you are on your bed/trolley at this point then when it’s in, you get a little drug squirted in, then the anaesthetist starts chatting holds a nice clear little mask over you’re itch just says relax and breath in, you do this a couple of times thinking I’m not tired, then the next thing you know you are awake and have boobs!!