Oh no - I've cleaned out my throttle body etc. in the same way and got away with it. I feel really sorry for you
I've never had a proper explosion like that.
Thought you were going to say that it ran badly or even threw a few codes while it re-learned control of the throttle plate (if it has been manually opened) as that's quite normal.
I tried to remove my inlet manifold recently as part of the work for removing my cylinder head, and I ended up taking the cylinder head off, leaving the manifold in place, because there isn't room to draw the alloy part off the studs on the head. There might be room if you unbolt the front engine and front gearbox mounts, then tip the engine forwards - but remember to unbolt the top stay if you do this, I tore mine with similar movements while trying to get the gearbox off.
I found that my four rubber inlet hoses were hard as iron, so I didn't try to split the plastic manifold from the alloy part as I knew they'd never seal again if I did, assuming they came off in one piece each. Suggest you may need to order replacements for those rubber hoses if you take them off. I would have, but was running low on funds.
If you do take the alloy part off, there is one of the 12mm nuts that's a b**** to reach near the variator solenoid. And for that matter, the power steering reservoir has two M6 capscrews - one on top (easy) and one down the side which is just a joke. Needs various bit-and-bit extensions plus 1/4" ring spanner (useful tool for using with small hex screwdriver bits). Of course these are 5mm-Allen key screws but there's little hope of getting an Allen key anywhere near it, so that's what I mean by screwdriver bits - the type with the 5mm Allen hex, hope you follow what I mean
While you're getting over the sheer cheek of the plastic inlet manifold being fitted in the first place, you may like to read Trimming in a snap
- I found it interesting