Well, not intentionally... 
I wonder if a similar prank can be pulled off in Singapore.
Maybe get a large group of SGF forumites to simultaneously "freeze"
in various positions at a bus terminal or MRT concourse during rush
hour.
They could hold their positions for only a minute or
two
, as I think five would be pushing it. The
authorities would probably misinterpret the prank as a silent mass
protest against rising bus and train fares and, in a classic
example of overreaction, send in the riot police, army rangers,
commandos, ghurkas, transport minister Raymond Lim to explain why
the increase in fares was necessary, and Mdm. Tan Siew Hoon to slap
the "protesters" silly. 
AAAaaaahhh Harharhar!!!
Seriously, I think if something like that happened here in
Singapore, the MIB (Men In Black) will be sent to "handle the
situation" swiftly and quietly. Instead of viewing it as a
good prank, it'll probably be treated as a public disturbance and
disruption to peace. The participants will kena charged, etc
etc. And then when I fly home in April, I'd have
to make a trip to Changi Prison to visit the forumites!
Oh, don't forget, you want to play a prank like that and not end
up jailed, you'd probably need to apply for a licence first!
