No it's the normal reaction, when I was 12 we went on a school trip to london and while on the coach back we got diverted because some looser wanted to jump of a building, being the nice little child that we were when we were close enought to the building to see him everyone was banging on the windows shout "do it" "jump" so I would say your reaction was perfectly normal!
When I was a teenager and lived in Manchester, there was a transvestite on the roof of Kendal's department store threatening to jump. A large crowd gathered and loudly encouraged him to fckng get on with it then.
I don't know what happened as i got bored and went off to the old loke shop in Tibb Street.
"Jump you f**ker jump!
Jump and I will catch you in this ere blanklet wot oi am 'olding
Eee jumped - hit the deck
Broke 'is facking neck
There was no blanket!
Oi aven't laffed so much since my auntie Mabel caught 'er left tit in the mangle"