[ErrantX]

I see your point; any injury requiring the trainer on the pitch requires you to go to the side and be waved back on specifically by the ref anyway.

5 minutes is too long though; a minute maybe (and even then nothing formally timed etc.)

[zalew]

a minute, involving another clock, another person to control the time, another clock ticking in the corner of the screen. meh, gimme a break :)