Would you rather eat a cup of baking soda and then do a shot of vinegar or eat a pack of Mentos and then chug a Diet Coke?

Chemical Reaction

Eat a cup of baking soda and then do a shot of vinegar

Baking soda and vinegar produce a comparatively slow, mild internal reaction, far less forceful than carbonated cola meeting Mentos
The Mentos and cola combination produces a rapid, high-pressure gas expansion that poses a more serious and dramatic physical risk
Baking soda and vinegar have each been consumed in food and medicine for centuries, suggesting manageable quantities are well-tolerated

Eat a pack of Mentos and then chug a Diet Coke

Testing confirmed that eating Mentos and drinking soda does not cause a dangerous internal explosion; the stomach walls contain the reaction
Chewing the Mentos before drinking disrupts the nucleation reaction that produces the geyser effect, making the combination largely harmless
Diet Coke and Mentos tastes far better than a mouthful of baking soda dissolved in vinegar, even if the physical outcome is similar
Waiting even a brief gap between eating and drinking allows the carbonation to dissipate, reducing the effect to nothing worse than a large burp