( this is a long one and it has been nagging me for a bit )

Grim reapers death scythes.
How in the living hell do they hide those things?
Especially Ronald, Grell and undertaker 
William you can explain him a bit
But look, let's use undertaker as a prime example

Those are not floating in your coat

You sir are not telling me your hiding all this in your coat, we all saw the jumping around you did before, you have a bloody scythe that is, taller then you, even so that blade alone is gonna kill you

^ sir no, the sticky things would have killed you are broken you somehow

Grell with the way you move your chainsaw would have cut you by know and you whip that thing out like it's a phone

^ out of no where but you see a flash witch brings me to my idea

Key chains
What if they have little charms?

Some thing like that! They can have them close to them and they can easily be 'summoned ' into the full size weapon and it makes your key chain pretty!
The reaper could have it anywhere and not be slowed down if chasing someone!, ( I know they are still fast little things ) it seems logical but it's still a headcannon, it would be cool if they did had key chains, now I'm still unsure of undertakers sticky things, he probably has them in a way but........you know, this is undertaker, he probably does