I call that 'the temporary experience of feeling rich'. The closest I've come to feeling that real money was like Monopoly money was when I was doing research in Surinam in the early 90s, and the inflation rate was 100%. That, and a black market exchange rate of 91 Surinam guilders to the dollar meant that I ended up having to spend money in order to get rid of surplus guilders on my last two days in the country.