Once the 4th rax has finished, pull half your SCVs and poke his ramp with your marines.
Pulling means you take them away from what they are currently doing.
So, you pull half of your SCVs away from your resources, but to do what?
This is pointed out in the next sentences:
You can first place a bunker outside his ramp to give you micro space. Once you're up the ramp, build another bunker and start targeting workers. Make sure to keep producing from your barracks and making depots.
Basically, you send some SCVs along behind your marines so that they can build bunkers and repair those bunkers, the other SCVs you have pulled are useful for supply depots and taking damage.
Every time that a SCV dies instead of a Marine when you are pushing him, it's in your advance.
Why does this work? As you are solely producing marines that cost 50 minerals and placing some buildings that cost 100 minerals, you are able to work with half the mineral income and still have constant production running.
When Terran pulls SCVs, it is strongest against zerg; however Mega Rax is also the hardest to hide from zerg.
In contrast with other races, Zerg is the only race that needs to decide whether he needs to spent his larvae on workers or on army units, as he is under pressure he will need to produce more army units at the cost of his workers. So, if you pull SCVs which gets your economy down, your opponent his economy will also be down because of the pressure that you apply on his production...
The term "clutch" was originally used in sports commentary, describing a player that can keep their head cool and perform well during a tense moment in a game, where the outcome of the competition was at stake.
Definitions of "clutch" (adjective):
happening during a very important or critical time especially in a sports competition
able to perform well in a very important or critical situation especially in a sports competition
This term has since migrated to competitive gaming, where is used in similar situations, usually in professional gaming events where there is a lot at stake.
A good example of the term is used in a recent IGN article on the International Dota 2 Championships:
Alliance and Na'Vi. Competitive Dota 2 fans dreams came true when the grand finals came down to an incredibly clutch play in the last match of the best of five series.
Best Answer
Epic points are earned by building epic buildings. An epic building takes 24 hours to complete, and during those 24 hours, you're set certain tasks that will earn you from 1-3 epic points. The number of epic points given by each specialization building is given in the building description. Generally, more expensive buildings yield more epic points.
The number of epic points that you earn while your building is being constructed determines whether your building will product bronze, silver, or gold tokens daily. The more of them you have, the faster your building will produce tokens. For example, if you earn ten epic points then your building will produce one quarter of a bronze token every day. 80 epic points yields a fraction of a silver token; 160 epic points yields a fraction of a gold token.