There are eight chuggas, standard, before a 'Choo-Choo', let me explain:

One 'Chugga': This is foolish. "Chugga Choo-choo". You would be removed from any respectable establishment.

Two 'Chuggas': "Chugga Chugga Choo-Choo." Do you even care? Evidence of the prematurely self gratifying fiend you've reduced yourself to likely from watching short form video. This is an incorrect amount of 'Chuggas'.

Three 'Chuggas': This is an odd number of Chuggas, you could be suggested to have a traumatic brain injury or some sort of attention disorder.

Four 'Chuggas': Look, I'll let this one slide. You are a busy man/woman/challenge and you need to shorten the rhythm of this imaginary train to fit your hectic modern schedule. I get it. Four 'Chuggas' is 'Diet Choo-Choo', you get a pass.

Five 'Chuggas': Again, an odd number of 'Chuggas'. Though this one seems almost deliberate enough to reveal you to be totally divorced of convention. Seize your freedom and personal liberty back; you rebel, you! Don't ever 'Chugga' again, though, after five because it's offensive.

Six 'Chuggas': Something came up. You were going for the appropriate amount of 'Chuggas' and some random incident interrupted you; or you chose the wrong amount of 'Chuggas', as this demonic number represents. May the power of Christ compel you.

Seven 'Chuggas': You have lost count. You have missed it by one and merely got distracted and lost count. Nobody wakes up and decides to deliberately offend God with seven 'Chuggas'. At least, nobody YOU know...

Eight 'Chuggas': This is the correct amount of 'Chuggas'. You have the first four 'Chuggas' to build the hype and the remaining four 'Chuggas' to sustain it, all climaxing into a perfect 'Choo-Choo'. This pleases the universe. This is the equivalent of sacrificing children for harvest or virgins to volcanoes.

Please respect this ancient craft, anything less than eight 'Chuggas' will bring a curse upon your family.