Time is measured in turns not seconds
In D&D 5e, movement and actions do not consume time, they consume actions. The game is inherently turn based. Actions happen in sequence, with each happening completely before the next can begin. The one exception is Readied Actions, which may interrupt other actions during a turn.
In the case of Readied Actions, ...
Disengaging the safety measures means flying backward 30 ft. and being rendered prone upon firing the Boom Gun
Rifts Ultimate Edition (2010) on the RG–14 Rapid Acceleration Electromagnetic Rail Gun says, "The blast [emitted by the Boom Gun] is so powerful that without the automatic stabilization system, the Glitter Boy would be thrown to the ground and ...
I gave it a little thought and decided that the rules do offer something for this: crawling. I would take a fish (or any other aquatic creature limited to only swim speed) out of water as being prone, moving only 5' as a move action that provokes attacks of opportunity and receiving all the penalties from being prone. And as mentioned above, there is the ...
Actually, the Bag of Holding and the Handy Haversack both count as extradimensional spaces, according to Portable Hole's own description text.
Last Paragraph Portable Hole's 5e item description:
Placing a portable hole inside an extradimensional space created by a Bag of Holding, Handy Haversack, or similar item instantly destroys both items and opens a ...
Standing up takes more effort; doing so costs an amount of movement equal to half your speed.
It uses whatever speed you would use for moving. I mean, there's no reason to get complicated about this. There are very few cases where there would be any ambiguity.
If you are on ground, use half your walking speed.
If you are underwater, use your swimming speed ...
Found the ultimate build for speed:
Barbarian: Path of the Totem Warrior 5
Monk: Drunken 10th
Ranger: Gloom Stalker: 3rd
Wizard: Bladesinging: 2nd
Magic Item: Elixer of Swiftness
Magic Item: Boots of speed
Start turn within Paladin Aura of Alacrity
Epic Boon of Speed
1 Round: 1 Mile!! Yep that is 5280 feet in 1 round ...
In 5e, your 6 second combat round isn't "do all of A then do B".
When you move and attack, you are doing it all at once; you are attacking as you approach, ducking and weaving, and attacking as you retreat.
30 feet isn't very far; a human can easily cross that distance in 3 seconds.
What they did was move at a full run 5 feet forward, duck and ...
They cannot hide after attacking on their turn.
The rules in the PHB are clear that you need to take the Hide action if you want the enemy to not know where you are, even while invisible.
However, if a player would like to attack every other turn and remain hidden while invisible, they can do so using the following procedure:
Hide on the first turn.