That's not how it works. The brakes are more powerful than the engine, sure, but only at full braking power. Ask anyone who owns a rear-wheel-drive sports car what happens when you push both pedals at the same time and they will literally leave you in a cloud of smoke.
The RWD thing is definitely important here. Given that the majority of cars and a significant number of SUVs are now FWD, this doesn't hold water. Given it is the front brakes that are more powerful than the rears, and if your brakes are maybe a tad worn out, you might not be able to take your brakes from a dynamic friction situation to a static friction situation. In the mean time, your engine would just continue injecting heat into the brakes, which could easily overcome them. It might also be that he was not braking with the full force initially, meaning some degree of heat saturation may have already been present.
I could rev my engine while pressing the brake on a 2014 Honda Civic (helped with not going backwards when I needed to start moving from a standstill on a steep hill). Is that modern enough for you?
(On the other hand my 2017 Subaru Forester does not do the same; thankfully it has less of a tendency to roll backwards when releasing the brake on a steep hill.)
You can get 120 pills of 100mg of caffeine for $6 including shipping "Jet-Alert 100 MG Each Caffeine Tab 120 Count". There are fancier ones that include L-Theanine (found in green tea) to mellow the caffeine jitters out but those are significantly more expensive.
Can confirm. Bought two in 2013, still have ~450 grams in the first bag I opened. Well worth the ~$50 (including a jeweler's scale) for a lifetime supply of preworkout supplements.
The FDA banned bulk caffeine sales in 2015[1] or 2018[2] too. This is probably a good idea, most folks have no idea how much caffeine is in a cup of coffee, much less how to measure that dose in powdered form.